Environment

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Waste Management Inc. collects garbage weekly for the city of Seattle. City officials are pondering a switch to every-other-week garbage collection and may test the concept at about 800 single-family homes in four areas this summer. (Associated Press)

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People wait as they are evacuated from a shopping mall after a strong earthquake was felt in Medan, Sumatra island, Indonesia, Wednesday, April 11, 2012. (AP Photo/Binsar Bakkara)

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In this image made from Indonesian television TV One, people on motorcycles and cars flee after a strong earthquake hit in Aceh in Indonesia, Wednesday, April 11, 2012. (AP Photo/TV One via AP Video)

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Ryu Kum-chol, of North Korea's Committee for Space Technology, says the rocket launch will be a peaceful effort to put a weather-and-research satellite into orbit. (Associated Press)

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Gasoline prices are shown at a local gas station in Miami, Wednesday, April 4, 2012. (AP Photo/Alan Diaz)

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Ryu Kum-chol, deputy director of space exploration in the Department of Space Technology of North Korea, speaks to the international media in Pyongyang, North Korea, on Tuesday, April 10, 2012. (AP Photo/David Guttenfelder)

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Flames pour from the windows of an abandoned warehouse in Philadelphia as crews douse it with water from all sides. Hot embers from the main fire blew to nearby structures, causing small fires that damaged six homes. (Associated Press)

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Former Arkansas Gov. Mike Huckabee, who launched a new talk-radio show Monday, said he was "going to be confronting the issues and not the listeners." (National Press Club)

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Orlando coach Stan Van Gundy and Dwight Howard have had less than a cordial relationship. Even though Howard re-signed with the Magic for next season, reports emerged that Howard asked team officials to fire Van Gundy.(Associated Press)

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**FILE** A satellite image taken Sept. 27, 2009, shows a suspected nuclear enrichment facility under construction inside a mountain located north of Qom, Iran. (Associated Press/DigitalGlobe)

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It was a fitting end to the Masters for Bubba Watson, who waves to the crowd Sunday night at the green-jacket ceremony. (Associated Press)

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Tiger Woods reacts to missing a birdie chip on the 12th green during the second round of the Masters tournament Friday, April 6, 2012, in Augusta, Ga. (AP Photo/Charlie Riedel)

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A rocket lifts off from Musudan-ri, North Korea, in 2009. A launch that year took an easterly path that sent the rocket directly over Japan's main island. (KRT via Associated Press)

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North Korea says this month's planned launch from its new Tongchang-ri launch facility on the country's west coast will send the satellite into a polar orbit. (Digital Globe via Associated Press)

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The bow of the Titanic rests on the bottom of the North Atlantic, about 400 miles southeast of Newfoundland. April 15 is the 100th anniversary of the sinking of the ship, touted as "unsinkable" because of its safety features, on its maiden voyage. (Associated Press)

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In Artisphere's Elevator to the Moon: Retro-Future Visions of Space, 15 artists have taken the predictions of the past — schematics, drawings, and literary descriptions of a year 2000 in which humans can taken an elevator to the moon — and renewed them for the future.