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Study: Half a Degree Matters

Last week more than 150 nations signed the Paris Agreement, pledging to hold the increase in the global average temperature to well below 2 degrees Celsius above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5 degrees Celsius. Now, the first comprehensive analysis of the impacts of that half centigrade difference…

C40 Cities Awards 2016 now open for submissions

C40 Cities Climate Leadership Group (C40) today launched a global call for submissions to the C40 Cities Awards 2016. All cities demonstrating leadership in climate action are encouraged to apply for a chance to be recognised in the world’s foremost sustainability awards. The fourth-annual C40 Cities Awards are being held in partnership with Bloomberg Philanthropies.…

The tribes of Ethiopia’s Lower Omo Valley in Photographs

    The Omo River rises on the mountainous plateau of Ethiopia’s Shewan Highlands, then flows for hundreds of kilometres through lush grasslands, acacia plains and riverine forests, until it reaches Kenya’s Lake Turkana. The river’s lower valley, in the southwest corner of the country, is a wild, beautiful, remote region.  In the mud and volcanic…

A Pacific salmon hub is under threat

The Skeena River snakes out of fir-lined fjords on the misty northern coast of British Columbia, and washes over a thousand-acre sandbar. Flora Bank is a biological bottleneck over which millions of finger-length young salmon enter the sea each spring. Scientist Allen Gottesfeld calls Flora Bank the “Grand Central Station” for the watershed. All streams…

Wolf – Caribou Detente? Clues Hidden on Lake Superior Islands

Qalipu, it’s called by Canada’s Mi’kmaq people. To others, it’s the elusive gray ghost of the far northern forest. Most know it simply as caribou. Woodland caribou are medium-sized members of the deer family. In Canadian provinces such as Ontario, these shadows in the forest are listed as threatened – quickly vanishing. Non-migratory woodland caribou…

Nations to Sign Paris Climate Agreement Friday

Four months after it was finalized by delegates to the Paris Climate Change Conference, the Paris Agreement will be signed by more than 100 nations on Friday. While the agreement is facially insufficient to meet its overall emissions objectives, the signing of the Paris agreement nevertheless is significant. It brings into effect the approach and…

Uncharted Arctic waters: A new opportunity for exploitation, or conservation?

Co-authored by Erica Cirino When thick sheets of sea ice began melting in the Arctic waters around Svalbard, Norway, a few years ago, a new expanse of sparkling blue sea opened up. As climate change continues to drive ice melt here on the previously untouched waters of the North Barents Sea, what many ocean conservationists…

Climate-Change-Related Precipitation Extremes Hard to Predict

Scientists have warned that severe drought and precipitation are among the risks of greenhouse-gas-induced climate change, but a study published in the journal Nature finds that extremely warm temperatures do not always translate into record wet and dry extremes. Highlighting the complexities in predicting the effects of planetary warming on precipitation, lead author Fredrik Ljungqvist…

Antarctic Ice-Sheet Collapse Could Trigger Rapid Sea-Level Rise

A study published in Nature finds that Antarctic ice-sheet collapse driven by greenhouse gas emissions could double the sea-level rise predicted for this century—from 3.2 feet according to a three-year-old United Nations estimate to upward of 6.5 feet by 2100. The research builds on the work of other recent studies pointing to an irreversible melting…

Record Low Arctic Sea Ice Extent Points to Irreversible Changes

Scientists at the National Snow and Ice Data Center (NSIDC) said on Monday that Arctic sea ice cover of 5.607 million square miles on March 24 represented the lowest winter maximum since records began in 1979. That’s 5,000 square miles less than last year’s record low. Contributing to the ice extent loss were record high…

February’s Record Heat Astounds Scientists

Data released last week by the National Oceanic and Atmospheric Administration (NOAA) shows that the string of monthly global heat records extended through February, when the average worldwide temperature was 2.18 degrees Fahrenheit above the 20th century average. The tenth straight record breaking month, February was the most above-normal month since meteorologists began tracking temperatures in…

U.S., Canada Announce Methane Reduction Plan

In a move that could help the United States and Canada meet pledges they made at last year’s United Nations Climate Change Conference in Paris, President Barack Obama and Canadian Prime Minister Justin Trudeau announced a plan to cut oil and gas industry methane emissions 40–45 percent, compared to 2012 levels, by 2025. In Canada,…

Cape Town Mayor Patricia de Lille on a more ambitious climate change agenda

Climate change is one of the most significant challenges facing our planet. At the COP21 climate negotiations in Paris in December, I was invited to participate in a number of events that dealt with the role cities can play in pushing national governments to commit to and achieve more ambitious climate change agendas. I have…

Supreme Court Denies Request to Block EPA’s Mercury Rule

Supreme Court Chief Justice John G. Roberts Jr. denied a request for a stay or injunction of the U.S. Environmental Protection Agency’s Mercury and Air Toxic Standards (MATS) rule—a rule that 20 states have claimed is “unlawful and beyond EPA’s statutory authority.” The ruling means MATS, which requires coal-burning power plants to install technologies to…

Watch: Monarch Butterflies Get Tiny Radio Trackers

National Geographic grantee Martin Wikelski tries to put electronic tags on free-flying monarch butterflies for the first time ever in order to track their remarkable migration.