"The Trump administration said late on Friday it was issuing final rules to suspend a 2016 Obama administration regulation that more than doubled penalties for automakers failing to meet fuel efficiency requirements."

"The Senate Environment and Public Works Committee is on track to advance a surface transportation bill with climate change components before the end of the month."

"Nearly two dozen governors, including several Republicans, are imploring the Trump administration to embrace more aggressive gas mileage requirements for the nation’s cars and pickup trucks, saying the White House’s effort to weaken existing requirements could hurt consumers, automakers and the environment."

"In the early months of the Trump administration, automakers pleaded for — and appeared set to receive — some relief from fuel economy standards that they said were too difficult to meet. But newly released government emails show how a coalition of groups that reject established climate science quickly muscled into the picture, urging the administration to go much further and roll back the rules entirely and characterizing the automakers as their opponents in achieving that goal."

"Those thin white clouds that jet engines draw across the sky are leaving their mark on the climate. A new study warns that the global heat-trapping effect of contrail clouds will triple by 2050 unless airlines and airplane builders dramatically reduce emissions or air traffic patterns change."

"Canada has signaled a willingness to buck one of President Trump’s most significant environmental rollbacks — a major weakening of auto pollution standards — by signing a clean-car deal with California, the state leading the fight against the rollback."

"A longtime former Environmental Protection Agency (EPA) staffer is accusing Administrator Andrew Wheeler of lying in a letter he wrote to Congress Tuesday that denied agency staff were shut out as EPA developed a controversial rollback on Obama-era fuel standards."

"The devastating flooding that has submerged large parts of the Midwest and South this spring has also brought barge traffic on many of the regions’ rivers to a near standstill. ... Shipments of grains, fertilizers and construction supplies are stranded."

"A last-minute push by automakers appears unlikely to sway the Trump administration from abandoning President Barack Obama’s signature climate policy to improve mileage standards for cars and light trucks, two government officials said Friday."

"Russia launched a nuclear-powered icebreaker on Saturday, part of an ambitious program to renew and expand its fleet of the vessels in order to improve its ability to tap the Arctic’s commercial potential."