"As thousands of hydroelectric dams are planned worldwide, including 147 in the Amazon, a new study finds that the true socio-environmental and cultural costs of dams are rarely evaluated before construction. Were such factors counted into the lifetime cost of the dams, many would not be built."

"When deadly heat waves hit on land, we hear about them. But the oceans can have heat waves, too. They are now happening far more frequently than they did last century and are harming marine life, according to a new study."

"Widespread and sometimes drastic marine oxygen declines are stressing sensitive species—a trend that will continue with climate change".

"Fish populations are declining as oceans warm, putting a key source of food and income at risk for millions of people around the world, according to new research published Thursday."

"Stratocumulus clouds, which hover low in the sky and create vast decks of cloud cover, have a supreme value in our warming world: Their white tops reflect lots of solar radiation back into space. ... Those stratocumulus cloud decks could vanish, further intensifying global warming."

"Evidence for man-made global warming has reached a “gold standard” level of certainty, adding pressure for cuts in greenhouse gases to limit rising temperatures, scientists said on Monday."