Sandbags sit stacked along the seawall in Kivalina, Alaska, in September 2007. The island town has accused a handful of mostly U.S. energy companies of contributing to global warming though greenhouse gas emissions, which it says has rendered the town uninhabitable. (Associated Press)
The eroding bank of the Ninglick River at Newtok, Alaska, has long been a problem for the village 480 miles west of Anchorage and other Alaska communities. Erosion is attacking Kivalina as well as Newtok so rapidly that residents could be forced to seek refuge elsewhere. (Associated Press)
The Alaskan island town of Kivalina argues that companies "knew or should have known of the impacts of their emissions on global warming." (Associated Press)
David Dobs, of Cumming, Ga., had a request to install solar panels on his home's roof denied after neighborhood officials said the panels would look out of place. "It's like living under communism," Mr. Dobs said. (Associated Press)
Donald Trump gives evidence April 25, 2012, to the Scottish Parliament's Economy Energy and Tourism Committee in Edinburgh, Scotland. (Associated Press/Scottish Parliament)
In this photo taken Monday, April 23, 2012, Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at Consol Energy Research and Development Facility in South Park Township, Pa. (AP Photo/Jae C. Hong)
The Ambassador Bridge, which connects Detroit to Windsor, Ontario, is privately owned. A second bridge has been proposed to ease mounting traffic flow. (Associated Press)
Planetary Resources Inc. mechanical engineer Peter Illsley puts finishing touches on a full-size prototype model of a low-orbit spacecraft before a news conference announcing a plan to mine nearby asteroids in Seattle on Tuesday. One of the company founders predicts they could have their version of a space-based gas station up and running by 2020. (Associated Press)
This computer-generated image shows a conceptual rendering of a spacecraft preparing to capture a water-rich, near-Earth asteroid. The plan is to use commercially built robotic ships to squeeze rocket fuel and valuable minerals such as platinum and gold out of the lifeless rocks that routinely whiz by Earth. (Associated Press)