"As the Democratic candidates for president made their requisite swing through the Iowa State Fair this week, they stumped near hay bales and posted about it on Twitter. They also brought an unprecedented focus on agriculture's connections with climate change—an issue that's getting more traction among rural Midwestern voters and farmers in the wake of massive flooding and heat waves."

"Scientists have measured big increases in the amount of methane, the powerful global warming gas, entering the atmosphere over the last decade. Cows or wetlands have been fingered as possible sources, but new research points to methane emissions from fossil fuel production—mainly from shale gas operations in the United States and Canada—as the culprit."

"ABOARD A NASA RESEARCH PLANE OVER GREENLAND — The fields of rippling ice 500 feet below the NASA plane give way to the blue-green of water dotted with irregular chunks of bleached-white ice, some the size of battleships, some as tall as 15-story buildings."

"The world is gradually becoming less green, scientists have found. Plant growth is declining all over the planet, and new research links the phenomenon to decreasing moisture in the air — a consequence of climate change."

"The vast, untapped coal reserve in northeastern Australia had for years been the object of desire for the Indian industrial giant Adani. In June, when the Australian authorities granted the company approval to extract coal from the reserve, they weren’t just rewarding its lobbying and politicking, they were also opening the door for Adani to realize its grand plan for a coal supply chain that stretches across three countries."

"A group of House Democrats is urging General Motors Co. and other leading automakers to join the four car manufacturers that have broken with the Trump administration and signed on to a deal with California to keep improving vehicle fuel economy."

"United States government scientists on Thursday confirmed that July was the hottest month on record, edging out the previous record-holder, July 2016."

"PLYMOUTH, England — Greta Thunberg, the 16-year-old climate activist, set sail Wednesday on a racing yacht bound for New York. The boat cast off from the Mayflower Marina here in this old English port city around 3 p.m. local time during a brief pause in the rain."

"A Trump administration plan to replace Obama-era methane standards for the oil and gas industry could leave behind a patchwork of state regulations and voluntary goals to rein in emissions from one of the most potent greenhouses gases."

"Ten environmental groups today filed a long-anticipated lawsuit against the Trump administration for its rollout of the Affordable Clean Energy rule, a regulation they say skirts EPA's duty to address climate change under the Clean Air Act."