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Climate


18 Feb 2015: Disease-Carrying Ticks Expand
Range and Emerge Earlier in Warmer Climate

Warmer spring temperatures in the northeastern U.S. are leading to shifts in the emergence of ticks that carry Lyme
blacklegged tick

Adult blacklegged tick
disease, and milder weather is allowing ticks to spread into new geographic regions, according to findings published this week. The data — which span 19 years and include observations of more than 447,000 ticks — show that the insects emerged nearly three weeks earlier in warmer years. And when fall temperatures were mild, a smaller percentage of larval ticks entered dormancy and waited until spring to feed, the study found. "Here in the Northeast, warming is already having an effect, and people need to be tick-vigilant before May, as potentially infected nymphal ticks are searching for their blood meals earlier and earlier," said co-author Richard S. Ostfeld, an ecologist at the Cary Institute.
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16 Feb 2015: Space-Based Measurments Can
Track Global Ocean Acidity, Researchers Say

An international team of scientists has developed new methods for studying the acidity of the oceans from space,

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ocean acidification map

Global ocean alkalinity measured from space.
according to research published in the journal Environmental Science and Technology. Currently, scientists must rely on measurements taken from research vessels and sampling equipment deployed in oceans to determine acidity — which rises as the oceans absorb CO2 from the atmosphere — but this approach is expensive and geographically limited. The new techniques use satellite-mounted thermal cameras to measure ocean temperature and microwave sensors to measure salinity. Together these measurements can be used to assess ocean acidification more quickly and over much larger areas than has been possible before.
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13 Feb 2015: Study Says U.S. Southwest Set
To Face Unprecedented Drying This Century

The U.S. Southwest and Great Plains are on track to face persistent drought during the second half of this century,

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risk of future drought

Risk of future prolonged drought in the Southwest
a new study forecasts, and the drought will be worse than anything seen in modern history or even during ancient so-called "megadroughts." Many studies have predicted that the Southwest could dry due to human-induced climate change, but this is the first to say that such drying could exceed the worst conditions of the distant past. The impacts of such a future drought would be devastating, the researchers say, given the region’s much larger population and heavy reliance on water and other natural resources. “The surprising thing to us was really how consistent the response was over these regions, nearly regardless of what model we used or what soil moisture metric we looked at,” said lead author Benjamin I. Cook, a researcher with Columbia University and NASA.
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11 Feb 2015: Learning About Geoengineering
Spurs More Agreement on Climate, Study Says

Geoengineering, an experimental series of technologies aimed at counteracting the effects of climate change, could potentially diminish political polarization over global warming, according to new research. Roughly 3,000 participants in a study displayed more open-mindedness toward evidence of climate change and more agreement on the significance of such evidence after learning about geoengineering technologies, according to a study conducted by researchers at Yale and other universities. Participants became more polarized when they were told that curbing climate change would require reducing greenhouse gas emissions, the researchers report. The findings come after a report this week from the U.S. National Research Council recommended limited government-sponsored research into the use of sulfate aerosols, a potential geoengineering strategy known as albedo modification.
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10 Feb 2015: Flooding in U.S. Midwest Is
Becoming More Frequent, Research Shows

Flooding in the U.S. Midwest has become more frequent over the last half-century, a new study in Nature Climate Change has
furniture displaced in flooding

Furniture displaced by flooding in Iowa in 2008.
found, confirming what many residents of the region had already suspected. Of the nearly 800 stream sites analyzed, more than one-third had an increase in flood event frequency, while only 9 percent showed a decrease in flooding. Although the study did not attempt to link the increase in flooding with climate change, the findings do fit well with current thinking among scientists about how the hydrologic cycle is being affected by climate change, the researchers say. In general, as the atmosphere becomes warmer, it holds more moisture, and one consequence of higher water vapor concentrations is more frequent, intense precipitation.
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09 Feb 2015: Norway Divests National Fund
From Coal Companies Over Climate Concerns

Norway has divested its sovereign wealth fund — the largest in the world and worth roughly $850 billion — from coal companies, marking the first time a nation has divested for reasons related to climate change. Over the past three years, the country has dropped investments in more than 100 companies involved in coal mining, tar sands development, cement production, and mountaintop removal coal mining, officials announced. In a report released last week, the fund's directors said that risks associated with carbon emissions, deforestation, and poor water management outweigh the benefits of continuing to invest in these companies. Critics point out that the fund, which has been built with earnings from Norway's profitable oil industry, still holds roughly $40 billion in fossil fuel investments. The country says it will decide on a case- by-case basis whether to divest from those holdings.
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06 Feb 2015: Maine’s Iconic Lobsters
Face Threats From Ocean Acidification

Maine’s lobster fishery, worth $1.7 billion to the state and a vital source of employment, could be

A Maine lobster
threatened by acidifying ocean waters and rising sea temperatures, according to a new report. The report, issued by a state commission, called increasingly acidic ocean waters — caused by the absorption of CO2 from the atmosphere — an “urgent matter” that needs to be addressed by state and local governments and the fishing infustry. Facing the prospect that increasing acidity could interfere with the ability of lobsters to make their shells, the commission set forth a handful of goals, including a stepped-up research effort on the acidification of the coast’s waters and its impact on crustaceans. Maine lawmakers have already introduced legislation for limits on industrial and agricultural runoff, which contribute to coastal water acidification.
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02 Feb 2015: Many California Farms and
Orchards Idled By Drought, NASA Maps Show

In 2014 — the driest year ever recorded in California — farms and orchards in the state's Central Valley took a major hit

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California agriculture status

Status of CA farms in 2011 (left) and 2014 (right).
and many agricultural plots were left fallow, as shown in these maps based on NASA satellite data. The maps depict the status of crop cultivation in California in August 2011 and August 2014. Brown pixels show farms and orchards that have been left fallow, or “idled,” since January 1 in each year. Green pixels show plots where at least one crop was grown during the year. The most recent year with average or above average precipitation across the state was 2011, and, as the map shows, relatively little agricultural land was left fallow that year. In 2014, a much higher proportion of farms and orchards were idle.
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30 Jan 2015: Thunderstorms Move Ozone
Toward Surface of Earth, Research Shows

Thunderstorms move a significant amount of ozone from the stratosphere down toward the earth's surface — a process

Thunderstorms transport ozone toward earth.
that could have important impacts on climate, according to a recent study in the journal Geophysical Research Letters. Ozone shields the planet from the sun's ultraviolet rays when it's in the stratosphere, the second-lowest layer of the atmosphere, but ozone acts as a powerful greenhouse gas and pollutant when it's nearer to the earth's surface, in the troposphere. The study found that massive thunderheads, which can rise 50,000 feet above the ground, disturb the atmosphere and allow ozone to pour into the troposphere. Scientists had not previously known that storms play a key role in transporting ozone. The new findings could impact climate models, researchers say, especially since storms are expected to become more frequent and intense as the earth warms.
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29 Jan 2015: Iceland Rising as Climate Change
Causes Glaciers to Melt, Researchers Say

The crust under Iceland is rebounding as climate change melts the island's great ice caps, researchers report in the

GPS stations measure Iceland crust movement
journal Geophysical Research Letters. The current rapid rising, or uplift, of the Icelandic crust is a result of accelerated melting of the island's glaciers and coincides with a regional warming trend that began roughly 30 years ago, the scientists said. Some areas in south-central Iceland are moving upward as much as 1.4 inches per year — a surprisingly high speed, the researchers say. Whether the rebound is related to past deglaciation or modern glacial thinning and global warming had been an open question until now, said co-author Richard Bennett, a geoscientist at the University of Arizona. "What we're observing is a climatically induced change in the earth's surface," Bennett said.
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22 Jan 2015: Draining of Greenland Lakes
Signals Massive Melting, Researchers Say

Researchers have discovered craters left behind when two lakes under the Greenland ice sheet rapidly drained recently — an indication

Crater left after a Greenland lake drained.
that a massive amount of meltwater has started overflowing the ice sheet's natural plumbing and is causing "blowouts" that drain lakes away, they say. One of the two lakes once held billions of gallons of water and emptied to form a mile-wide crater in just a few weeks, researchers report in the journal The Cryosphere. The other lake, described this week in the journal Nature, was two miles wide and has filled and emptied twice in the last two years. The researchers suspect that as more meltwater reaches the base of the ice sheet, natural drainage tunnels along the Greenland coast are cutting further inland. The tunnels carry heat and water to areas that were once frozen to the bedrock, potentially causing the ice to melt even faster.
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20 Jan 2015: Genetic Diversity Is Key To
Food Stability in Changing Climate, UN Says

As climate change advances, much more should be done to study, preserve, and take advantage of the biological diversity

Wild red rice is hardier than cultivated varieties.
underpinning world food production, according to a new report by the United Nations Food and Agriculture Organization (FAO). Between 16 and 22 percent of current crop species — including 61 percent of peanut and 12 percent of potato species — could become extinct in the next 50 years, the report notes. Wild strains, which are often better at adapting to environmental changes, will become increasingly important for feeding the global population, which is expected to grow by 3 billion people by 2050, the report says. Strengthening gene and seed banks, improving breeding practices, increasing genetic diversity on farms and in fields, and preserving soil microbiomes will be key to boosting crops' climate resilience, the FAO said.
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15 Jan 2015: Underwater Kelp Forests Mapped
In New Citizen Science Project

Kelp forests grow along roughly 25 percent of the world’s coastlines and provide valuable habitat and nutrients for many types of aquatic life. Now, research by the “Floating Forests” project is shedding light on how these underwater kelp forests are affected by climate change. The project is using NASA satellite data to observe changes in kelp forests over a period of more than four decades. The catch: No accurate way to automate the process exists, so the researchers rely on an international team of nearly 3,500 citizen scientists to mark the bright green kelp forests, which contrast with the deep blues of the ocean in the images.
Read more.
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13 Jan 2015: California Still in Widespread
Drought, Despite Heavy Precipitation

The heavy rains and snow that fell across much of California in the first half of December did little to recharge the state's

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California precipitation deficits

California precipitation deficits
dry reservoirs or ease long-term drought conditions, an analysis by the National Oceanic and Atmospheric Administration (NOAA) confirms. By the middle of December, 98 percent of the state remained under drought conditions, which is the same portion as before the storms, according to the U.S. Drought Monitor. Dry conditions over the last three years have left the Sierra Nevada mountain range with a 30- to 50-inch precipitation deficit, NOAA reports, and the agriculture-heavy San Joaquin Valley has fared even worse. To bring the state's four-year precipitation total out of the bottom 20 percent historically — a benchmark used to declare drought conditions — every part of the state would need to exceed its average rainfall between now and September.
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09 Jan 2015: Most Physicians Already Seeing
Health Effects of Climate Change in Patients

In a survey of physicians in the American Thoracic Society (ATS), the majority of doctors said their patients

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health effects of climate change

Results of survey on climate change and patient health
were already experiencing medical conditions associated with climate change and that physicians should be educating their patients and policy makers about climate-related health effects. Seventy-seven percent of ATS physicians — a group of doctors specializing in respiratory health and critical care — said air pollution associated with climate change is exacerbating chronic conditions such as asthma in their patients. Nearly 60 percent reported increases in allergies from plants or mold and injuries from severe weather related to climate change. Many of the physicians who responded to the survey said exposure to smoke from wildfires had caused or worsened lung conditions in their patients, and changes in precipitation and weather patterns seemed to be affecting patients as well, the Huffington Post reports.
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08 Jan 2015: Land Disturbances Darken Snow
And Increase Melt Rate, Researchers Say

Land disturbances, such as agricultural practices and development, may have a big impact on snow purity and

Sampling snowpack in Montana
melt rates, according to a large-scale survey of impurities in North American snow by researchers at the University of Washington. The researchers were particularly interested in the Bakken oil fields of northwest North Dakota. Before undertaking the study, they predicted that diesel emissions and air pollution associated with oil exploration would darken the snowpack, decreasing the amount of sunlight it reflects and increasing its melt rate. They found, however, that while these activities do add soot to the snow, the dirt they stir up adds an equal amount of impurities to the snowpack. Disturbances from clearing oil pads, new housing sites, agricultural activities, and extra truck traffic on unpaved roads add a significant amount of dirt to snowfields, they found.
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06 Jan 2015: Penguin Watch Projects Asks
Citizen Scientists to Monitor Birds' Habits

Penguin Watch, a citizen science project launched by researchers from the University of Oxford in the U.K., is enlisting the

Group of Gentoo penguins
public's help in counting penguins in some 175,000 photos from locations across the Southern Hemisphere. Researchers are monitoring five penguin species — Gentoo, Chinstrap, Adelie, Rockhopper, and King penguins — and recording information on the number of adults, chicks, and eggs, as well as their winter behavior, breeding success, and travel habits. The project is especially useful for monitoring penguins' winter behavior, for example, because it's logistically difficult for the researchers to visit these locations in winter, they say, and the images are far too numerous for researchers to view on their own. Understanding how the penguins live day-to-day should help shed light on how the penguins will respond to an increasingly volatile climate, the team says.
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02 Jan 2015: Historical Photos Help
Document Changes in Greenland Glaciers

Historical photographs from the early and mid-1900s have helped researchers from Denmark map the retreat

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Photo of a Greenland glacier from 1935
of Greenland's glaciers, according to findings presented recently at the American Geophysical Union meeting. This glacier near the Sukkertoppen ice cap in southwest Greenland, for example, retreated roughly two miles between 1935 and 2013, as shown in photographs from the Danish Geodata Agency and the Natural History Museum of Denmark. Older photographs, from 1900 to 1930, show even more remarkable changes. During that time, following the end of the Little Ice Age in the late-19th century, glaciers retreated more rapidly than they have been in recent years, the researchers say. They believe the findings will shed light on how quickly these glaciers might react to future temperature changes.
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29 Dec 2014: The Arctic Is Absorbing
More and More Sunlight, NASA Images Show

The Arctic has been absorbing significantly more sunlight since the year 2000, according to NASA satellite data,

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Changes in absorption of sunlight in the Arctic
a trend that mirrors the steady decrease in Arctic sea ice during that same period. These maps show changes in the amount of solar radiation absorbed over the Arctic from 2000 to 2014, as well as changes in sea ice cover during the same period. As sea ice cover declines and more dark ocean is exposed to the sun's rays, that decreases the reflectivity, or albedo, of the ocean's surface, meaning more heat is absorbed. Shades of red depict areas absorbing more sunlight and areas with less ice cover. The Arctic's rate of absorption has increased by 5 percent every June, July, and August since 2000. No other region on the planet has shown significant changes in albedo during that time, researchers say.
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A Green Dilemma for the Holidays:
Better to Shop Online or In-Store?


Various studies in recent years have suggested that online shopping typically packs a lower carbon punch than shopping at brick-and-mortar stores. But new research suggests the story is more complicated than that. The key, according to a report in the Journal of Cleaner Production, is to minimize the number of miles driven per item — whether by the shopper, a local delivery van, or a FedEx truck.
Read more.
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19 Dec 2014: 'Nuisance Flooding' Will Affect
Most of U.S. Coastline by 2050, Report Finds

By 2050, most U.S. coastal areas are likely to be threatened by 30 or more days of flooding each year due sea level

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Nuisance flooding projections for U.S. cities
rise, according to a new report the National Oceanic and Atmospheric Administration (NOAA). The researchers looked at the frequency of so-called "nuisance flooding," which occurs when the water level reaches one to two feet above local high tide, and found that several cities along the East Coast are already seeing more than 30 days of nuisance flooding each year. Additional major cities — including Baltimore, Atlantic City, Philadelphia, and San Francisco — will reach or exceed that benchmark by 2030, the report says. Although nuisance flooding is not typically catastrophic or dangerous, it is often costly. The report drives home the point, researchers say, that such floods will become commonplace far earlier than 2100, which is generally cited as the date when sea level rise is likely to become damaging.
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18 Dec 2014: Clearing Rainforests Distorts
Global Rainfall and Agriculture, Study Says

Clearing forests not only releases carbon into the atmosphere, it also triggers worldwide shifts in rainfall and temperatures

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Global effects of forest loss
that are just as potent as those caused by current carbon pollution and that pose great risk to future agricultural productivity, researchers report. Deforestation in South America, Southeast Asia, and Africa may alter growing conditions in agricultural areas as far away as the U.S. Midwest, Europe, and China, the study in Nature Climate Change finds. The researchers calculate that complete tropical deforestation could trigger atmospheric changes leading to an increase of 0.7 degrees Celsius in global temperatures, in addition to warming caused by greenhouse gases released from the deforestation itself. That would double the observed global warming since 1850, the researchers note. They say their findings indicate that many of the predicted changes associated with widespread deforestation are already occurring — from Thailand, which is receiving less rainfall at the beginning of the dry season, to parts of the Amazon, where once-predictable rainfall has shifted notably.
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Beyond Lima: Major Investors
Must Fund Global Green Initiatives

Much of the discussion at the recent U.N. climate talks in Lima, Peru, was about the financing that

Climate talks in Lima stretched into Sunday.
will be needed to decarbonize the world’s energy supply, improve efficiency, and redesign cities and transportation systems to reduce greenhouse gas emissions. As journalist Isabel Hilton reports for e360 from Lima, moving the broader financial markets toward green investments is critically important in order to avoid the worst impacts of climate change. The key, Hilton writes, is to get major institutions to invest in sustainable growth, particularly renewable energy, and to get major companies and the industrial sector to understand that they must revise their strategies to address the risks of climate change.
Read Hilton's analysis.
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15 Dec 2014: Draft Climate Accord Reached
In Lima Leaves Many Doubts in Its Wake

While lead negotiators at the Lima climate talks hailed a hard-fought climate agreement forged over the weekend, many critics say the accord does not go nearly far enough in forcing meaningful reductions in global greenhouse gas emissions. The accord marks the first time that all nations, rich and poor, have agreed to submit plans outlining how they will reduce carbon emissions. But the Lima Accord, intended to lay the groundwork for crucial climate talks next December in Paris, does not include legally binding requirements that countries cut their emissions by a specific amount. As the negotiations dragged on for an additional two days, an agreement was reached on Sunday only after China and other nations killed a provision that would have required all countries to submit readily comparable emissions data. Still, many climate officials praised the plan because it marked the first time that nearly 200 nations agreed to submit blueprints on how they plan to reduce greenhouse gases.
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12 Dec 2014: Majority of Americans Support
Climate Actions and Negotiations, Poll Says

Most Americans want the United States to be a world leader in combating global warming and to be participating in international climate negotiations, according to a poll by the Associated Press-NORC Center for Public Affairs Research and the Yale School of Forestry & Environmental Studies. Sixty-one percent of Americans think the U.S. should lead other nations on climate change, even if it means taking action when other countries do not. A majority of both Democrats and Republicans support some specific policies intended to curb greenhouse gas emissions in the U.S., the poll found, such as funding research for clean energy and regulating CO2 emissions. Less than 20 percent of people polled think such protections would harm the economy long-term, while 60 percent say they would improve economic growth and provide jobs.
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11 Dec 2014: India and Australia Are
Focus of Attention in Lima Climate Talks

As United Nations climate talks in Lima, Peru, near an end, negotiators and observers are looking at India and Australia to see whether they will support a draft agreement to reduce greenhouse gas emissions. With China and the U.S. having agreed last month to reduce carbon emissions, India — the world’s third largest emitter of CO2 — has said its emissions will continue to rise as it pulls its people out of poverty. But India’s environment minister said in Lima yesterday that the country would spend $100 billion on clean energy and climate adaptation projects and would play its part in cutting CO2 emissions. Australia — whose Prime Minister, Tony Abbott, has weakened the country’s climate laws — is playing a constructive role at the talks and may support a draft emissions-reduction agreement that could be ratified next December in Paris, observers said. Australian Foreign Minister Julie Abbott said that any climate agreement “must [move] past the developed-developing country divide that puts a brake on real action.”
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10 Dec 2014: Draft Agreement in Lima Talks
Calls for Emissions Cuts by All Nations

A draft agreement calling for all nations to commit to greenhouse gas emissions cuts is circulating among climate negotiators in Lima, Peru, The New York Times reports. The proposed text calls for each of the 196 countries involved in negotiations to publicly commit to its own plan for reducing emissions. Those individual plans, however, will be driven by national politics and economic concerns, rather than by what scientists say is needed to curb the worst effects of climate change, critics say. Historic pledges by the U.S. and China last month to cut emissions catalyzed the new draft text, negotiators say, because the two nations — the world's largest greenhouse gas emitters — had been spoilers in previous climate talks. “It’s a breakthrough, because it gives meaning to the idea that every country will make cuts,” said Yvo de Boer, the former executive secretary of the United Nations Convention on Climate Change. The goal for the Lima talks is to settle on a draft text, which could become the basis for a deal signed by world leaders in Paris next December.
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09 Dec 2014: As Ministers Arrive,
Lima Climate Talks Face High Hurdles

With government ministers and UN secretary General Ban Ki-moon arriving at climate negotiations in Lima, Peru, large gaps remained between developed and developing countries over the issues of formalizing aid to poorer countries to adapt to climate change. Climate negotiators in Lima are drafting a negotiating outline for key climate talks in Paris next December, which many governments hope will lead to a binding global treaty to slash carbon emissions. The U.S. and the European Union want the focus of any treaty to be on emissions cuts, or mitigation, while developing nations are seeking written guarantees from wealthy nations to provide financing and other assistance to developing countries for climate adaptation. Ban Ki-moon has said he is confident that this divide can be bridged before the Lima talks end on Friday. Delegates from the Philippines, a country hit hard recently by typhoons and other weather-related disasters, said in Lima that they will push hard for a new deal requiring all nations, including developing countries, to slash emissions.
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03 Dec 2014: Public Largely Unaware of Meat
And Dairy's Contribution to Climate Change

The general public has a major lack of understanding of how eating meat and dairy contributes to climate change,

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Perceived vs. actual carbon emissions
according to a survey of Europe, the Americas, Asia, and Africa by the market research organization Ipsos MORI. Although meat and dairy production accounts for roughly 15 percent of total global carbon emissions — equal to exhaust emissions from the international transportation sector — less than 30 percent of survey respondents identified meat and dairy production as a major contributor to climate change. More than twice as many — 64 percent — said transportation was a major contributor. Closing the awareness gap is essential for changing meat and dairy consumption patterns, researchers said, especially in developed nations such as the U.S. Although much of the projected increase in meat and dairy consumption will likely happen in emerging economies, respondents in Brazil, India, and China demonstrated greater consideration of climate change in their food choices and above-average willingness to modify their consumption — an encouraging sign, researchers said.
PERMALINK

 

02 Dec 2014: New Proposal Outlines
Key Elements for a Global Climate Pact

Coinciding with U.N. climate talks in Lima, Peru, this week, a consortium of policy experts has released a proposal

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Key components of a global climate pact
outlining the key ingredients of a comprehensive climate agreement in Paris next year. Three major components of such a pact, the group said, will be a long-term plan to phase out all greenhouse gas emissions as early as possible in the second half of this century; a long-term goal of reducing the vulnerability and building the resilience of communities facing climate impacts; and establishing five-year cycles for assessing and strengthening nations' actions to cut emissions and adapt to climate change. The proposal stresses "fairness, equity, and justice in climate actions," and suggests different timelines and responsibilities for developed and developing countries. The analysis, from experts at 10 research institutions, is based on interviews with climate negotiators and hundreds of government representatives.
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