"Lung-damaging silica, other toxic substances kill and sicken tens of thousands each year as regulation falters".

"China seeks a fair, global system to tackle climate change and will deliver its pledge to the United Nations by the end of Tuesday on how much it will cut emissions, Chinese Premier Li Keqiang said after talks with top European Union officials."

"The Supreme Court ruled [Monday] that the Obama administration unlawfully failed to consider compliance costs before it issued its landmark power plant emission limits for mercury and other hazardous pollutants."

"The fields are heating up, there are little black rubber pellets everywhere, and feet are covered with blisters."

"At the vast BNSF rail yard in Kansas City, Kan., dozens of trains stretch into the distance. You can feel them rumble. You can hear the roar of 4,400-horsepower diesel locomotives. And you can smell their exhaust."

"The League of Conservation Voters (LCV) launched an advertising campaign Friday against Sen. Mark Kirk (R-Ill.), who is running for reelection."

"A solar plane took off for what could be the longest solo flight in history on Monday, with its Swiss pilot confronting the “moment of truth” of a journey around the Pacific Ocean and around the world."

"President Obama's $3 billion plan called 'cold comfort' by Republican leaders, who haven't allocated it to help coal-dependent communities."

"The Smithsonian Institution said Friday it would adopt tighter procedures to govern conflicts of interest involving its researchers, the latest development in a widening national discussion of scientific integrity."

"Germany's oldest remaining nuclear reactor has been shut down, part of a move initiated four years ago to switch off all its nuclear plants by the end of 2022."