New Jersey is pulling out of the Regional Greenhouse Gas Initiative, and three other states may follow. Why is RGGI on the ropes and who is throwing the punches? RGGI is made up of 10 northeastern states stretching from Maine to Delaware. In 2008, they banded together to form a carbon-trading program for power plants --- a market mechanism that enables utilities to buy and sell emission credits so they can meet caps on the amount of carbon they're allowed to put into the air.

"The 1985 bombing of the Rainbow Warrior made the converted fishing trawler a campaigning icon. Now, in its 40th anniversary year, Greenpeace is launching its first purpose-built protest ship – one of the most technologically advanced vessels to set sail."

Dengue fever, a painful disease transmitted by mosquitos, is now showing up in Florida for the first time in more than 70 years. Climate change could be a factor.

Firefighters working dangerous night shifts were barely beginning to get a handle on some 6 wildfires in Arizona that were spreading to New Mexico, the largest of which, the Wallow fire, was barely more than 10 percent contained. Regional smoke continued to be a serious health threat. Authorities looked for a human cause to blame the fire on, even though the tinder-dry conditions had been causing the Wallow fire to spread at nearly 1,000 acres per hour. Evacuations began in New Mexico even as some Arizona evacuees were being allowed to return home.