Interview: Drones Are Emerging
As Valuable Conservation Tool
Ecologist Lian Pin Koh
is co-founder of a project called ConservationDrones.org
, which is pioneering the use of
Lian Pin Koh
low-cost drones in conservation efforts and biological research across the globe. In an interview with Yale Environment 360
, Koh, a researcher at the University of Adelaide, explains how drones – also known as unmanned aerial vehicles (UAVs) – can help monitor protected areas, collect data in inaccessible regions, and even deter poachers. “In just the last couple of months,” he says, “there has been tremendous interest from universities and other research institutes that finally see the value in this technology.”
Read the interview.
View a gallery.
Global meat production has expanded more than four-fold over the last 50 years — and 25-fold since
Beef cattle graze in Colombia
1800 — due to growing purchasing power, urbanization, and changing diets, according to a new report from the Worldwatch Institute
. Consumers in industrial countries still eat much larger quantities of meat (75.9 kilograms per person) than those in developing nations (33.7 kilograms), though that gap is beginning to close, the report says. Nearly 70 percent of the planet's agricultural land and freshwater is used for livestock, with additional land and water used to grow grains for livestock feed. Beef production alone uses about three-fifths of global farmland and yields less than 5 percent of the world's protein, according to the report. Sustainable agricultural practices
such as feeding livestock with grasses instead of grains and using natural fertilizers could reduce these impacts, the report notes, but alternative dietary choices hold the most immediate promise for reducing the environmental footprint of meat production.
Green Innovations Are Bringing
Energy-Saving Technology Home
Advances in technology and consumer demand for energy-saving devices have made green technology
increasingly accessible. Many innovations are geared toward homeowners looking to lower not only their energy bills, but also the carbon footprints of their homes and daily activities. From solar-harvesting shingles and windows to shoe insoles that can power a smartphone, this Yale Environment 360
gallery explores a few of these energy-saving technologies.
View the gallery.
Implementing policies to curb carbon emissions dramatically cuts health care costs associated with poor air quality — in some cases, by more than 10 times the cost of policy implementation, according to
new research published in Nature Climate Change
. Policies aimed at reducing carbon emissions are as effective as laws targeting polluting compounds like ground-level ozone, also known as smog, and fine particulate matter, the MIT researchers say. An analysis of three climate policies — a clean-energy standard, a transportation policy, and a cap-and-trade program — found that savings from avoided health problems could recoup 26 percent of the cost of implementing a transportation policy, and up to to 10.5 times the cost of implementing a cap-and-trade program. A cap-and-trade program would cost roughly $14 billion to implement, whereas a transportation policy with rigid fuel-economy requirements could cost more than $1 trillion, according to the analysis. Policies targeting specific sources of air pollution, such as power plants and vehicles emissions, did not lead to significantly larger benefits than cheaper policies, such as a cap-and-trade approach, the study found.
Interview: Making the Rights of
Farm Animals a Basic Green Issue
Conservation organizations have long sought to protect pandas, polar bears, and pelicans, but the welfare of
farm animals has largely been left to activist animal-welfare groups like the Humane Society of the United States
. For the past 10 years, that organization has been headed by the politically savvy Wayne Pacelle, who has greatly increased its visibility and influence. Under his leadership, the society has lobbied successfully to curb what it calls the worst excesses of “factory farms.” In an interview with Yale Environment 360
, Pacelle talked about how treatment of farm animals is linked to greenhouse gas emissions, why his group is promoting “meatless Mondays,” and why consumers should be willing to pay more for products from animals that are sustainably raised.
The western U.S. has lost so much water during the ongoing severe drought that the land has sprung up by
GPS station in California's Inyo Mountains
as much as 15 millimeters (0.6 inches), according to a study in the journal Science
. Water at the surface of the earth typically weighs down the land, but the region has lost enough water that the tectonic plate underlying the western U.S. has undergone rapid uplift, much like an uncoiling spring, researchers explain. California's water deficit over the past 18 months has caused some of its mountain ranges to rise by more than half an inch, and the West overall has risen by 0.15 inches, according to the study. Using ground positioning data from GPS stations throughout the region, researchers from the University of California, San Diego, estimate the water loss to be 240 gigatons (63 trillion gallons) — equivalent to a nearly four-inch layer of water spread out over the entire western U.S.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
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Antarctica and the Arctic
Central & South America
Photographer Peter Essick documents the swift changes wrought by global warming in Antarctica, Greenland, and other far-flung places. View the gallery.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject).
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
In a Yale Environment 360
video, photographer Pete McBride documents how increasing water demands have transformed the Colorado River, the lifeblood of the arid Southwest. Watch the video.