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Science & Technology


25 Jan 2016: Massive Transformation to Clean
Energy in the U.S. is Possible, Study Says

A rapid and affordable transformation to wind and solar energy within 15 years is possible in the U.S., according to a new study by NOAA

Map showing U.S. wind energy potential
and University of Colorado Boulder researchers published in the journal Nature Climate Change. This energy transformation could slash greenhouse emissions by as much as 78 percent below 1990 levels, the study said. One of the biggest issues with weather-related power generation is its inherent intermittent nature, leading utilities to rely on gas-fired generators and other reserves during cloudy or low-wind periods. The solution to this problem is to scale up renewable energy generation systems to match the scale of weather systems, the scientists said. The model partially depends on significant improvements to the nation’s outdated electrical grid, including the creation of new, high-voltage direct-current transmissions lines.
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07 Jan 2016: New Device Harvests Energy From
Walking and Exercising, Researchers Say

Researchers at MIT have developed a new method for harnessing energy generated by very small bending motions, which could be capable

Schematic of new human energy harvester
of harvesting power from a broader range of natural human activities such as walking and exercising. Based on electrochemical principles — the slight bending of a sandwich of metal and polymer sheets, with materials similar to those in lithium ion batteries — the new technology can more effectively capture energy from human motions than previous devices. Those devices, which were based on frictional technology or the compression of crystalline materials, can capture energy from mechanical vibrations, but they are not as compatible with the pace of human movements, the researchers explain in the journal Nature Communications. When bent even a very small amount, the new layered composite produces a pressure difference that squeezes lithium ions through a polymer. The process produces alternating electrical current, the researchers say, which can be used directly to power devices such as cell phones and audio players.
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06 Jan 2016: Graphene Membrane Can Clean
Nuclear Wastewater, New Research Shows

Microscopic graphene membranes can effectively filter radioactive particles from nuclear reactor wastewater

Microscopic image of graphene membrane
at room temperature, researchers from the University of Manchester have shown. Writing in the journal Science, the researchers demonstrated that graphene membranes can act as a sieve, separating different varieties of hydrogen — both radioactive and non-radioactive isotopes — from water. The new technology could also be scaled to produce significant amounts of so-called "heavy water," which is a non-radioactive component that is required in large quantities to produce nuclear energy. The graphene technology is 10 times cheaper and more efficient than current methods of producing heavy water. "This is really the first membrane shown to distinguish between subatomic particles," said University of Manchester researcher Marcelo Lozada-Hidalgo.
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10 Dec 2015: Paris COP21: An Unexpected Move
Toward Global Target of 1.5 Degrees

It is the big surprise of the Paris talks: the growing acceptance of a call from small nations most vulnerable to climate change

Johan Rockström
for the conference to declare warming should be halted at 1.5 degrees Celsius. Even a few months ago, this seemed unimaginable. Two degrees was the only target on the table. But here it has gained momentum with more than 100 nations, including the U.S. and the EU, agreeing it should be in the final agreement. With more than a day of talks remaining, inclusion is far from a done deal. But it has strong support. A 1.5-degree target “looks much more scientifically justifiable,” said Johan Rockström, director of the Stockholm Resilience Institute.
Read more.
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07 Dec 2015: Soaring Global CO2
Emissions May Have Peaked, Data Show

CO2 emissions in 2015, at 35.7 billion tons, are likely to be exactly where they were two years ago, according to a new study

Global CO2 emissions are projected to fall in 2015.
published in the journal Nature Climate Change. The flat-lining emissions trajectory is the result of China's recent sharp decline in coal burning and the global surge in renewables like wind and solar power, said Corinne Le Quéré, director of the Tyndall Centre at the University of East Anglia in Norwich, England, who led the analysis. The study estimates China's emissions have fallen by 3.9 percent this year. Le Quéré said she does not believe the world has yet hit "peak emissions." Continued rapid industrial expansion by countries such as India that still rely on coal for energy means further rises probably lie ahead, she said. But the evidence is growing that peak emissions may be closer than previously imagined.
Read more.
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25 Nov 2015: Airlines Could Halve Emissions
By 2050 by Making Cost-Saving Changes

Airlines could cut their greenhouse gas emissions in half over the next 35 years by making changes that would actually

Cost-effective changes could cut airline emissions.
save them money, according to research published in the journal Nature Climate Change. Researchers developed a list of 14 strategies, all based on current technologies, that airlines could pursue to cut emissions, which account for roughly 2 to 3 percent of the total carbon dioxide added to the atmosphere each year. For example, one recommendation is to keep planes at the gate until takeoff rather than making them idle on the runway, or to use fewer engines — perhaps even electric engines — when taxiing. Emissions could also be cut significantly by reducing aircraft weight, the researchers say, such as by lowering the amount of extra fuel carried or replacing seats and brakes with ones made from lighter materials. Updating flight paths to more direct routes, adjusting altitude and speed to avoid drag-inducing turbulence, and retiring older planes would also cut costs and emissions.
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20 Nov 2015: Global Forest Cover Estimates
Vary Widely Based on Definition, Study Says

Measurements of global forest cover can vary widely — by as much as 6 percent of the planet's land area, a swath equal in size

Enlarge

Forest cover calculations
to China, according to research from the University of Maryland. The reason behind the discrepancy actually lies in how different researchers and organizations define forest cover, the researchers note. Geographers have long called for the definition to be standardized, but until now, no one had quantified the scope of the variance. The largest ambiguities in forest calculations are driven by uncertainties near savannas, shrublands, mountain ridge forests, and other areas with intermediate tree cover. “It’s not technology’s fault” that forest maps are inconsistent, said lead author Joseph Sexton. But until the definitions are standardized, he said, it will be difficult to properly assess land cover or conservation measures related to climate change and biodiversity.
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19 Nov 2015: Genetically Engineered Salmon
Approved for Sale in U.S. Supermarkets

The U.S. Food and Drug Administration today approved genetically engineered salmon for human consumption, marking the first

AquAdvantage salmon (top) compared to conventional salmon
time an animal with genetic alterations has been cleared for sale in supermarkets across the nation. A long and bitter battle has surrounded the issue, and this approval comes five years after government reviewers deemed AquAdvantage Atlantic salmon, as the fish is known, safe for consumers and the environment. Opponents have argued that the genetic integrity of wild salmon could be threatened if the GM fish were to escape from contained farms into rivers and oceans. The company says, however, that the fish will be raised on land, thus making escape into the wild impossible, and that the GM salmon can be farmed more efficiently because they have a faster growth rate than conventionally farmed salmon.
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17 Nov 2015: New Study Finds Limited and
Uneven Water Reserves Near Earth's Surface

Roughly 5.5 million cubic miles of groundwater are stored in the earth’s crust, according to new research published in

Enlarge

Groundwater distribution
the journal Nature Geoscience, but the resource is distributed unevenly across the globe, as shown in this map. Combining data with models on the permeability and porosity of rocks and soils, and on water table gradients, researchers illustrated the depth of groundwater around the world. If earth's groundwater were to cover the planet's surface evenly, the scientists predicted that the pool would be approximately 600 feet deep. However, only six percent of this groundwater is usable for most purposes. This water, which is closer to the surface, is also more sensitive to climate change and human contamination. The research highlights how unevenly this resource is distributed across the globe, scientists say, as well as the need to manage water reserves in a sustainable way.
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13 Nov 2015: Sharks Will Likely Be Less
Effective Hunters With Climate Change

Sharks will likely become much smaller and less aggressive hunters under the rising CO2 levels and warming oceans associated

Port Jackson sharks are bottom-dwellers.
with climate change, according to a study published in Scientific Reports by University of Adelaide researchers. In large-tank laboratory experiments with Port Jackson sharks — a bottom-feeding variety that primarily relies on smell to find food — the researchers found that the combination of warmer water and high CO2 increased the sharks' energy requirements and reduced their metabolic efficiency. Elevated CO2 levels also dulled the sharks' sense of smell to the point that they were unable to locate prey — a finding confirmed in previous CO2/olfaction studies. Together, these effects led to dramatic reductions in the sharks' growth rates. "With a reduced ability to hunt, sharks will no longer be able to exert the same top-down control over the marine food webs, which is essential for maintaining healthy ocean ecosystems," said lead researcher Ivan Nagelkerken.
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10 Nov 2015: New Online Tool Maps Lands
Managed and Protected by Indigenous People

Indigenous people have historically demarcated their ancestral lands in a variety of ways, from rudimentary agreements and maps to,

Enlarge

A new online tool maps native lands.
more recently, drone surveys. But until now, there has been no systematic way of recording the actual boundaries and legal status of each swath of land managed by native peoples, who, as research shows, often do a better job of protecting their lands than local or national governments. LandMark, a new tool launched today by a broad partnership including the World Resources Institute (WRI), is the first online, interactive platform for mapping lands managed by native communities. It was created to fill a critical gap in indigenous and community rights and make clear that these lands are not vacant, idle, or available to outsiders for exploitative development such as mining, palm oil plantations, or timber concessions. But Abdon Nababan, secretary general of the Indonesia's Indigenous Peoples' Alliance, cautioned that “these maps do us no good unless they become public knowledge and indigenous rights are recognized by all who have ambitions to grab our lands.”
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09 Nov 2015: Globe Is Set to Cross 1 Degree C
Temperature Increase Threshold in 2015

The United Kingdom’s Met Office says that 2015 will be the year when average world temperatures rise more than 1 degree C (1.8 F)

Enlarge

Globaly, 2015 is expected to be warmer than 2014.
above pre-industrial levels. That is halfway to the 2 degrees C temperature increase threshold that scientists say could dangerously destabilize the planet’s climate system. The Met office reported that from January to September this year, global temperatures hit 1.02 degrees C above pre-industrial averages and that temperatures for the full year are virtually certain to be above the 1 C level. Meanwhile, the World Meteorological Association (WMO) reported that atmospheric concentrations of CO2 in 2014 averaged 397.7 parts per million and that average 2015 concentrations could surpass the 400 ppm mark. “We are moving into uncharted territory at a frightening speed,” WMO Secretary General Michel Jarraud said.
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30 Oct 2015: Thousand-Year Storm Event
Leads to Striking Flooding in Death Valley

A system of storms this month caused significant flooding in most of Death Valley National Park in southeastern California. These images,

Enlarge

Flooding in Death Valley
obtained via a U.S. Geological Survey-NASA satellite, contrast the region's moisture content in October 2015 and October 2014, which was a year with typical precipitation. The images have been enhanced with false color to highlight water at or near the surface of the earth; green and blue indicate locations with high moisture content. Especially striking is Badwater Basin, the lowest point in North America at an elevation of 279 feet below sea level, which is usually a dry lakebed. In the 2015 image, Badwater Basin is full of water. Flash floods from the so-called "1,000-year" flood event destroyed roads and utilities, and damaged several historical structures, according to the USGS.
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27 Oct 2015: Thawing Permafrost Soils
Rapidly Release CO2 Into Atmosphere

A new study in Alaska shows that as permafrost soils thaw, they rapidly release carbon dioxide into the atmosphere, further exacerbating

Researchers collected samples of permafrost from underground tunnels.
global warming. Researchers from the U.S. Geological Survey and two universities dug a tunnel in permafrost near Fairbanks and subjected the frozen soils to rising temperatures. The study showed that permafrost is highly biodegradable, with the carbon in the thawing soils rapidly being consumed by single-celled organisms. Those organisms then release carbon into the atmosphere. The study, published in the Proceedings of the National Academy of Sciences, documented some of the fastest permafrost decomposition rates ever recorded. In effect, the researchers said, thawing means that permafrost — currently isolated from the carbon cycle — has the potential to become a major source of carbon emissions.
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Interview: ‘Third Way’ Technologies
Could Help Turn the Tide on Climate

Massive seaweed farms that suck carbon dioxide out of the atmosphere and counteract ocean acidification. The widespread adoption of carbon
Tim Flannery
Tim Flannery
fiber technology that extracts CO2 from the air and turns it into cars and other industrial products. Concrete manufacturing that is carbon-negative rather than the energy-guzzling Portland cement used today. These and other ideas represent what Australian scientist Tim Flannery calls “third way technologies” — safe methods to reduce carbon dioxide levels that could be adopted in concert with large-scale reductions in greenhouse gas emissions. In an interview with Yale Environment 360, Flannery explains that unlike risky geo-engineering schemes, these approaches “strengthen Earth’s own self-regulatory system by drawing CO2 out of the atmosphere in ways the planet naturally does already.”
Read the interview.
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15 Oct 2015: Gates Calls Divestment
A `False Solution’ to Global Warming

Bill Gates, the founder of Microsoft and co-chair of the Bill and Melinda Gates Foundation, has called the fossil fuel divestment campaign a “false solution” to climate change and says the best way to decarbonize the global economy is by developing revolutionary renewable energy technologies. “We need an energy miracle,” Gates told The Atlantic magazine. “That may make it seem too daunting to people, but miracles in science are happening all the time.” Gates said he is pledging $2 billion of his foundation’s endowment to research and develop alternative energy technologies. He criticized the divestment movement for “using up (campaigners’) idealism and energy on something that won’t emit less carbon.” The Gates Foundation, the world’s largest charitable organization, has $1.4 billion invested in fossil fuel companies, and activists have been calling on Gates to sell those holdings.
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14 Oct 2015: Toyota Vows to Eliminate
Nearly All of Its Gasoline Cars by 2050

The global automobile giant, Toyota, has announced plans to steadily phase out production of gasoline-powered cars and to slash emissions from its fleet by 90 percent by 2050. Speaking in Tokyo, Toyota executives vowed to work with government officials and other companies to replace internal combustion cars with hydrogen fuel cell vehicles and hybrids. “You may think 35 years is a long time, but for an automaker to envision all combustion engines as gone is pretty extraordinary,” said a senior Toyota executive. The company said that by 2020 annual sales of its hybrid vehicles will reach 1.5 million and sales of fuel cell vehicles will hit 30,000 — 10 times the projected figure for 2017. Meanwhile, Volkswagen, shaken by scandal over falsifying emissions data on its diesel cars, announced it will increasingly shift production to hybrid and electric vehicles.
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06 Oct 2015: Styrofoam May Be Biodegradable
After All, Thanks to Mealworms, Study Says

Mealworms can survive on a diet of polystyrene plastics — commonly used to make Styrofoam — according to research published in

Mealworms devouring Styrofoam
the journal Environmental Science and Technology. The findings point toward a possible solution for dealing with one of the most-polluting forms of plastic. In the study, 100 mealworms consumed between 34 and 39 milligrams of Styrofoam per day. These worms were as healthy as those fed a normal diet, the researchers report, and excreted biodegraded Styrofoam fragments that were usable as agricultural soil. While studies have found that other organisms, including waxworms and Indian mealmoth larvae, are able to digest plastics such as polyethylene, this is the first organism able to digest Styrofoam, which is generally considered non-biodegradable. The discovery could aid in better understanding of the conditions and enzymes that contribute to plastic degradation.
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02 Oct 2015: Brown Carbon Plays Larger Role
In Climate Than Assumed, Study Says

Climate models are underestimating the effects of so-called brown carbon from sources such as forest fires because the models

Wood-burning stove
do not account for regional factors — such as areas where wood-burning stoves are common — when estimating brown carbon's climate-warming impacts. Black carbon, primarily from urban combustion sources like vehicles and factories, absorbs the most sunlight, the researchers explain, and it's well-accounted for in climate models. However, most models don't properly account for brown carbon, the researchers say. Brown carbon "can be a significant absorber of sunlight, making it as bad for climate warming as black carbon," said co-author Manvendra Dubey of Los Alamos National Laboratory. The study, published this week in Nature Communications, stresses the differing effects of black and brown carbon on the climate: Solid wood combustion, a source of brown carbon soot, is pervasive during United Kingdom winters, but very uncommon in other study locations, such as Los Angeles, which generally sees more black carbon soot from vehicles.
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25 Sep 2015: ‘Pop-up’ Wetlands Will
Help Millions of Migrating Birds This Fall

Birds migrating south from the Arctic this fall will have access to 7,000 new acres of temporary wetland habitat for their California

Semipalmated plover
stopovers, according to researchers with NASA, The Nature Conservancy, and other academic and conservation organizations. The BirdReturns program creates “pop-up habitats” — temporarily flooded rice fields — for some of the millions of sandpipers, plovers, and other shorebirds that migrate each year from their summer Arctic breeding grounds to winter homes in California, which is in the midst of a severe drought, Mexico, and Central and South America. By combining on-the-ground observations and NASA satellite data, researchers can identify areas where birds flocked during previous migrations. Matching the location and timing of the pop-up wetland habitats with the route and timing of migrating shorebirds is critical, researchers say.
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Interview: A Scientist’s View
On How to Repair the Planet

For an environmental scientist who studies how humanity is pushing the earth close to potentially disastrous tipping points, Johan Rockström — author
Johan Rockström
Johan Rockström
of a new book, Big World, Small Planet — is surprisingly optimistic. Although he reckons that our species has crossed four of nine “planetary boundaries,” including those on climate change and deforestation, he believes there is still time to pull back from the brink and create a sustainable future based on renewable energy and a “circular” economy that continually reuses resources. In an interview with Yale Environment 360, Rockström describes how an alignment of science, technological advances, and a growing public hunger for action can get civilization back on track. “It’s not a journey where we are backing into the caves,” says Rockström. “It’s a journey of high technology ... and huge, multiple benefits.”
Read the interview.
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21 Sep 2015: Rising Seas and More Intense
Storms Likely to Cause Major Flooding Spike

Rising seas and increasingly frequent and intense storms along the U.S. Atlantic and Gulf coasts could interact to produce alarming

Enlarge

Sea temperature increases along the Atlantic and Gulf coasts
spikes in the extent and duration of floods, according to a study published in Nature Climate Change. The study projects that coastal flooding could possibly shoot up several hundred-fold by 2100, from the Northeast to Texas. Even the study's most conservative calculations, based on greatly reduced greenhouse gas emissions over the next 85 years, suggest a 4- to 75-fold increase in the the combined heights and durations of expected floods. Over the past century, the East Coast has experienced sea level rise far beyond the 8-inch global average — up to a foot in much of the Mid-Atlantic and Northeast, including New York City. Most projections call for a further 2- to 4-foot rise by 2100, and some estimates go as high as 6 feet. At the same time, other studies suggest that in the future the largest North Atlantic storms may become more intense because warmer waters contain more energy.
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18 Sep 2015: Genes of Greenlanders Preserve
Evidence of Ancient Arctic Adaptation

The DNA of modern-day Greenlanders shows how their Inuit forefathers adapted to the harsh Arctic environment they called home

80% of Greenlanders identify as Inuit.
for thousands of years, according to findings published in the journal Science. The Arctic is an extreme environment, characterized by a cold climate and sparse vegetation. The typical diet of Greenlanders — and their ancient ancestors — is made up primarily of proteins and fats from fish and marine mammals, and carbohydrate and vegetable consumption is minimal. By collecting genetic information from 4,500 modern Greenlanders, researchers determined which genes have changed the most over the roughly 20,000 years since Greenlanders' most ancient Inuit ancestors separated from their nearest East Asian relatives, the Han Chinese. The genetic changes the researchers identified show that through natural selection the Greenlandic Inuit's genetic makeup evolved in a way that enabled them to efficiently metabolize the fatty acids from fish and to live with few carbohydrates and vegetables.
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11 Sep 2015: Flooding Fields in Winter May
Help California Water Woes, Study Suggests

Deliberately flooding California farmland in winter could replenish aquifers without harming crops or affecting drinking water, according to

This flooded alfalfa field is part of the study.
early results from a study by University of California, Davis, researchers. Winter months, when crops are dormant, typically see more precipitation than summer months, when crops are actively growing and farmers rely on groundwater reserves for irrigation. Several water districts have attempted to sequester excess surface water during storms and floods by diverting it into infiltration basins — confined areas of sandy soil — but those basins are scarce. Instead, researchers suggest that some some 3.6 million acres of farmland could serve a similar purpose — particularly fields of wine grapes, almonds, peaches, and plums — because those lands allow deep percolation with little risk to crops or groundwater quality.
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01 Sep 2015: European Project Recruits
Smartphone Users to Collect Pollution Data

A European project that begins today asks smartphone users to collect data on air pollution in major cities across the

Smartphone with the iSpex accessory
continent. In the iSpex-EU project, volunteers will use a free accessory attached to their smartphones to capture the spectrum of sunlight reaching their phones. Using those readings, scientists can determine levels of fine particles and aerosols in the atmosphere. Once enough data has been collected, the researchers plan to create maps showing where ground-level air pollution poses the highest risks. A recent study from King’s College in London estimated that, in London alone, roughly 9,500 premature deaths each year are linked to high levels of air pollution. After smoking, air pollution is the second-largest public health challenge in the region, researchers say.
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31 Aug 2015: Researchers Develop Artificial
Leaf That Efficiently Mimics Photosynthesis

Researchers at the California Institute of Technology have developed an artificial leaf that can produce hydrogen fuel through

Artificial leaf device
a process similar to photosynthesis, according to findings published in the journal Energy and Environmental Science. The system is the first complete, efficient, and safe solar-driven device for splitting water to create hydrogen fuels, say the researchers, who have been seeking a cost-effective method for producing energy using only sunlight, water, and carbon dioxide. The new system consists of two electrodes that produce oxygen and hydrogen gases, along with a specialized membrane that keeps the gases separate to prevent the possibility of an explosion. The artificial leaf converts 10 percent of the energy in sunlight into hydrogen fuel and can operate for more than 40 hours continuously, the study says.
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27 Aug 2015: NASA Study Quantifies Plants'
Role in Mitigating Urban Heat Island Effect

The presence or scarcity of vegetation is an essential factor in determining how much urban areas heat up, according to a NASA study.

Enlarge

Urban heat island effect
Using data from multiple satellites, the researchers found that areas covered in part by impervious surfaces such as asphalt, concrete, and steel had an average summer temperature 3.4 degrees F higher than nearby rural areas. The highest U.S. urban temperatures compared to surrounding areas were along the Interstate-95 corridor from Boston to Washington and around Atlanta and the I-85 corridor in the Southeast. In desert cities such as Phoenix, the urban area was actually cooler because irrigated lawns and trees provide cooling that dry, rocky areas do not, the researchers explain. The urban heat island effect occurs primarily during the day, when impervious surfaces in cities absorb more sunlight than surrounding vegetated areas.
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20 Aug 2015: Global Warming Has Worsened
California Drought By Roughly 25 Percent

Rising temperatures driven by climate change have measurably worsened the California drought by increasing evaporation rates and

A Central Valley orchard stricken by the drought.
exacerbating the state's lack of rainfall by up to 27 percent, according to a study from Columbia University's Lamont-Doherty Earth Observatory. While natural weather variations are largely thought to have caused the state's precipitation deficit, rising temperatures appear to be intensifying the situation by driving moisture from plants and soil into the air. The new study is the first to estimate how much worse increasing evaporation rates are making the drought: potentially as much as 27 percent, and most likely 15 to 20 percent worse. Scientists expect higher rainfall levels to resume as soon as this winter, but evaporation will more than overpower any increase in precipitation. This means that by around the 2060s, a drought that is essentially permanent will set in, interrupted only by sporadic rainy years.
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13 Aug 2015: Dangerously Hot and Humid
Days Soon Will Become Regular Occurrences

Climate change will make "danger days" — periods when temperature and humidity push the heat index to 105 degrees F or

View interactive map

'Danger days' by city
higher — much more common over the next 15 years, according to a Climate Central analysis. Looking at 144 U.S. cities, the team determined that only 12 cities have averaged more than one dangerously hot and humid day per year since 1950. By 2030, though, 85 cities — home to nearly one-third of the U.S. population — will likely experience at least 20 danger days each year. That's a dramatic and fast-approaching change from current conditions, the analysts note. Houston, for example, saw only three danger days between 2000 and 2010, but it should expect 102 danger days each year by 2050. The most dramatic increases will be seen in the South, the analysis found. Charleston, West Virginia, is expected to become the most dangerously hot and humid city in the country, experiencing 168 danger days per year by mid-century.
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Interview: A Scientist Who Probes
The Rich Inner Lives of Animals

Ecologist Carl Safina has made his name studying and writing about the world’s oceans and the creatures that inhabit them. Now, Safina
Carl Safina with orphaned elephants
Carl Safina
has turned his attention to the fascinating and controversial topic of the inner lives of animals, exploring, as he puts it, “the incredible shimmering world of nuance that many of these creatures experience in their lives with one another.” In an interview with Yale Environment 360 about his recently published book, Beyond Words: What Animals Think and Feel, Safina explains why it’s vital to our own humanity to more deeply empathize with wild creatures and sharply criticizes some research on animal behavior, saying it has led to a flawed understanding of the natural world. “I bristle at the idea that an animal can 'pass a test' administered by human beings,” says Safina. “It’s irrelevant whether the animal corresponds to your concept of something.”
Read the interview.
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