Caroline Kennedy, the US ambassador to Japan, tweeted that she was "deeply concerned" about the killing of dolphins in the notorious Taiji cove in that country.

"The average temperature of Earth maintained its warming trend in 2013, despite seasonal and regional variations that included a shrinking ice cap in the Arctic and a massively growing one in the southern hemisphere, U.S. scientists said on Tuesday."

"There are more than a thousand species of sharks and rays in the world, and nearly a quarter of them are threatened with extinction, according to a new study. That means these ancient types of fish are among the most endangered animals in the world."

"BEIJING — Filthy emissions from China’s export industries are carried across the Pacific Ocean and contribute to air pollution in the Western United States, according to a paper published Monday by a prominent American science journal."

"Climate change will play havoc with farming, and policy makers and researchers aren’t fully aware of the significance on food supply, according to the World Bank."

"An ambitious trade pact being negotiated among Pacific Rim nations so far fails to properly protect endangered species and could undermine existing safeguards for the environment, environmental groups said on Wednesday."

"Gaps forming in seasonal Arctic sea ice may be creating a toxic conveyor belt, drawing mercury from higher altitudes to rain down on the ice, snow and tundra, according to a new study."

"Scientists who gathered decades of measurements from hundreds of thousands of trees all over the world are punching a hole in the common assumption that large, old trees are biologically pretty much over the hill.

"WASHINGTON — The Obama administration is retreating from previous demands of strong international environmental protections in order to reach agreement on a sweeping Pacific trade deal that is a pillar of President Obama’s strategic shift to Asia, according to documents obtained by WikiLeaks, environmentalists and people close to the contentious trade talks."

"The rapid loss of top predators such as dingoes, leopards and lions is causing an environmental threat comparable to climate change, an international group of scientists has warned."