As soon as next week, the president is expected to unveil new initiatives to tackle climate change -- including long-awaited rules on power plants.
The city aims to cut net greenhouse gas emissions to zero by 2050. But energy-sucking indoor marijuana operations could throw the effort off course.
The Army Corps of Engineers says it won't review the climate-changing impacts of plans to export coal from Northwest ports, a blow to enviros and many political leaders in the region.
Climate change "is the global threat of our time," Obama said in a big speech at the Brandenburg Gate. Fitting, as the weather in Berlin was an unseasonably hot 92 degrees.
Heavy farm runoff and heavy rainfall could lead to a New Jersey-sized dead zone in the Gulf of Mexico this year. The news for Chesapeake Bay is more upbeat.
China took its first step toward a national carbon-trading system on Tuesday, launching a pilot project in the city of Shenzhen.
TransCanada plans to stick with older spill-detection systems on the pipeline, ignoring EPA's recommendation that it upgrade to more advanced equipment.
Heartland claimed that Chinese scientists were subscribing to its skeptical climate views. The Chinese Academy of Sciences denounced that claim as "false."
A French company plans to bring 500 electric cars and 1,200 charging stations to Indiana's capital, starting next year.