Environment

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Rescue teams use dogs as they look for three workers reported missing at a factory in Medolla, Italy, after a magnitude 5.8 earthquake struck the same area shaken by a larger tremor nine days earlier. (Associated Press)

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Italian firefighters search the debris of a collapsed factory in Mirandola, northern Italy, Tuesday, May 29, 2012. A magnitude 5.8 earthquake struck the same area of northern Italy stricken by another fatal tremor on May 20. (AP Photo/Marco Vasini)

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Smog clouds the view most days from Beetle Rock in Sequoia National Park, Calif. The pollutants are making life tough for the iconic sequoias - the biggest and oldest living things on Earth - and various pines. Visitors are warned to be wary, too. (Associated Press)

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A vegetable vendor peeks out from behind a sign promoting arugula at a market in Buenos Aires. (Associated Press)

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**FILE** Officers of the urban management bureau, known as chengguan in Chinese, demand Nov. 20, 2011, a beggar and his child leave a street in Guiyang, in southwestern China's Guizhou province. (Associated Press)

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Gerry Bell, lead seasonal hurricane forecaster at the National Oceanic and Atmospheric Administration's Climate Prediction Center, discusses the upcoming hurricane season at a press conference in Miami on Thursday, May 24, 2012. (AP Photo/J. Pat Carter)

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Mohamed El Baradei, former chief of the International Atomic Energy Agency, speaks May 24, 2012, to the media in Vienna, Austria. (Associated Press)

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Craftmark Homes is building 91 single-family homes at Park Ridge in Clarksburg. The Oakton Alternate model, with 4,275 square feet, is priced from $738,900 to $758,900.

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Photo by patrick Michaelyan, Positive Energy LLC The calibrated door blower test is a common diagnostic measure used by firms that conduct energy audits. It helps pinpoint where cracks and poor seals are letting air in and out of a home.

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Quarry Springs at Stoneyhurst in Bethesda will offer 97 condominium homes in four buildings on the site of the oldest working quarry in the region. The homes, with 2,200 to 4,000 finished square feet, will range in price from $1,800,000 to $4,000,000.