"President Obama has signed into law a bill that requires U.S. airlines be excluded from European carbon emissions fees."

"Slowing cargo vessels near coastlines by 10 to 15 miles per hour could dramatically cut ships’ air pollution, according to a new study. But only a few U.S. ports have initiated such efforts."

"BILLINGS, Mont. -- Eastern Montana residents will weigh in this week on a proposed 83-mile coal railroad with the potential to usher in a dramatic expansion of mining in the state and increase exports of the fuel to Asia."

"Climate change is expected to drop water levels in the Great Lakes, experts said Wednesday. Levels could drop anywhere from a few inches to several feet as water evaporates in the drought conditions."

"The chief of the Army Corps of Engineers on Tuesday approved a $2.9 billion plan to restore wetlands destroyed by construction of the Mississippi River-Gulf Outlet. But the corps continues to demand that

25 Senators are asking the White House to spend more money on dredging harbors and channels -- a special problem in the Great Lakes, where near-record low water levels caused by drought and possibly climate change are costing shippers money.