"A new study finds that a commonly used insecticide kills much of the sperm created by male drone honey bees, one reason why the bees are dwindling."

"Health experts in Brazil have a word of advice for the Olympic marathon swimmers, sailors and windsurfers competing in Rio de Janeiro’s picture-postcard waters next month: Keep your mouth closed."

"Multi-ethnic nations are vulnerable to armed conflicts after weather disasters such as heatwaves and droughts in a trend that could worsen with global warming, scientists said on Monday."

"A solar-powered aircraft successfully completed the first fuel-free flight around the world on Tuesday, returning to Abu Dhabi after an epic 16-month voyage that demonstrated the potential of renewable energy.
"

"An international agreement to reduce hydrofluorocarbons could prevent 0.5 degrees of warming by the end of the century, officials say."

"It’s no news that Greenland is in serious trouble — but now, new research has helped quantify just how bad its problems are. A satellite study, published last week in the journal Geophysical Research Letters, suggests that the Greenland ice sheet lost a whopping 1 trillion tons of ice between the years 2011 and 2014 alone."

"Earth's persistent record 2016 heat is now dancing near levels that a world agreement is trying to avoid, federal scientists said."

"Three attorneys general on Tuesday directly challenged Volkswagen’s defense over its emissions deception, calling the decision to thwart pollution tests an orchestrated fraud that lasted more than a decade, involved dozens of engineers and managers and reached deep into the company’s boardroom."

"As Ukraine's civil war raged, a few mouse clicks at three local power companies set in motion the covert intrusion. It was the first successful attempt at planting a bug, then disabling an electric grid serving hundreds of thousands of people."

"Two leading U.S. Senate Democrats say last year's Paris climate deal should help one of its architects become the next U.N. secretary-general."