International

"U.N. environment chief Erik Solheim said on Tuesday he had resigned after receiving a final audit of his official travel."

"A decade ago, the U.S. mandated the use of vegetable oil in biofuels, leading to industrial-scale deforestation — and a huge spike in carbon emissions."

"For years, insect populations have been dropping worldwide without a clear explanation. A new paper suggests male infertility is at least one factor behind that decline, as warmer-than-usual temperatures take a disproportionate toll on males of some insect species."

"The daily rate of eggs stolen from shorebirds' nests in the Arctic is three times higher than it was 70 years ago. The trouble, which coincides with warming temperatures, could impact vulnerable populations of stunning birds."

"With window units set to more than triple by 2050, home air conditioning is on pace to add half a degree Celsius to global warming this century, a new report says."

"Mahiuddin, a 35 year-old farmer from Badghis, a mountainous province in western Afghanistan, has been living in a camp outside the city of Herat for months, one of tens of thousands displaced by the worst drought the country has seen in years."

"Earth’s protective ozone layer is finally healing from damage caused by aerosol sprays and coolants, a new United Nations report said."

"A new study says that many large-scale hydropower projects in Europe and the US have been disastrous for the environment."