Environment

Iraq Assembly vote.jpg

People walk past election campaign posters of different parties, in Irbil, Iraq, 350 kilometers (217 miles) north of Baghdad, Friday, Sept. 20, 2013, day ahead of the self-ruled northern Kurdish region's fourth election for local parliament since 1992. (AP Photo/ Khalid Mohammed)

NASA deep impact.jpg

This undated artist rendering released by NASA shows the Deep Impact spacecraft. In 2005, it smashed a comet with a projectile to give scientists a peek of the interior. The spacecraft went on to rendezvous with two more comets. On Friday, Sept. 20, 2013, the space agency declared an end to the mission after failing to regain contact with the spacecraft. (AP Photo/NASA)

MEXICO20.jpg

Residents of the storm-battered southern Mexican state of Guerrero use the courtesy phones provided at a temporary shelter in the Convention Center in Acapulco, Mexico, Thursday, Sept. 19, 2013. Hundreds were in the shelter, including several hundred from a village hit by a landslide Monday afternoon, where officials said at least 58 people were missing and presumed dead. (AP Photo/Michael Weissenstein)

AP105922789643.jpg

**FILE** Protestors gather at the National Mall in Washington on Feb. 17, 2013, calling for President Obama to reject the Keystone XL oil pipeline from Canada, as well as act to limit carbon pollution from power plants and “move beyond” coal and natural gas. (Associated Press)

Helicopter Crash-Ax M_Lea.jpg

William Bart Colantuono, a helicopter pilot who previously appeared in the History channel's "Ax Men" series, died on Tuesday, Sept. 17, 2013, when his chopper crashed while attempting to lift logs in an Oregon forest. (AP Photo/History)

Gulf Oil Spill Hallib_Live.jpg

**FILE** The Deepwater Horizon oil rig burns after a deadly explosion in the Gulf of Mexico on April 21, 2010. (Associated Press)

Japan Nuclear_Lea.jpg

Japanese Prime Minister Shinzo Abe (second from right, with a red helmet) is briefed about a chemical dam by Fukushima Dai-ichi nuclear power plant chief Akira Ono (second from left) as the lawmaker inspects an area along the coast between the No. 1 and No. 2 reactors during his tour of the tsunami-crippled plant in Okuma, Fukushima Prefecture, Japan, on Thursday, Sept. 19, 2013. (AP Photo/Japan Pool)

OKLAHOMA19.jpg

Law enforcement officials from multiple agencies examine the two cars pulled from Foss Lake, in Foss, Okla., Wednesday, Sept. 18, 2013. The Oklahoma State Medical Examiner’s Office says authorities have recovered skeletal remains of multiple bodies in the Oklahoma lake where the cars were recovered. (AP Photo/Sue Ogrocki)