Environment

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In this photo taken on Friday Feb. 21, 2014, Greek street artist Fikos paints a wall in the Kolonos area of Athens. The 27-year-old painter studied Byzantine art, influencing his work.(AP Photo/Dimitri Messinis)

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In this photo taken on Friday Feb. 21, 2014, Greek street artist Fikos paints a wall in the Kolonos area of Athens. The 27-year-old painter studied Byzantine art, influencing his work. (AP Photo/Dimitri Messinis)

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In this photo taken Thursday March 20, 2014, pedestrians walk along Fourth Avenue in Anchorage, Alaska. The north side of Anchorage's main street, now occupied by the Fourth Avenue Market Place at left, dropped 11 feet in a landslide caused by the March 27, 1964, Great Alaska Earthquake. (AP Photo/Dan Joling)

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In this photo taken Wednesday March 19, 2014, a four-story apartment complex occupies the site of the six-story Four Seasons Apartments that collapsed in the Great Alaska Earthquake on March 27, 1964, in Anchorage, Alaska. The site at Ninth Avenue and M Street in downtown Anchorage was directly over a graben, or depression, opened by the quake. (AP Photo/Dan Joling)

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In this photo taken Wednesday March 19, 2014, is the Seward Highway near Portage, Alaska. The Great Alaska Earthquake on March 27, 1964, opened fissures on the highway at the head of Turnagain Arm and destroying nearby bridges and railroad track. (AP Photo/Dan Joling)

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In this photo taken Wednesday March 19, 2014, is the former site of Government Hill Elementary School in Anchorage, Alaska. The school which was destroyed by the Great Alaska Earthquake on March 27, 1964, is now a neighborhood park, Sunset Park. (AP Photo/Dan Joling)

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File - In this March 28, 1964 file photo, with the city under martial law, soldiers patrol a downtown street in Anchorage, Alaska. In bacground is the wreckage of the five-story Penney store at Fifth Avenue and D Street. North America's largest earthquake rattled Alaska 50 years ago, killing 15 people and creating a tsunami that killed 124 more from Alaska to California. The magnitude 9.2 quake hit at 5:30 p.m. on Good Friday, turning soil beneath parts of Anchorage into jelly and collapsing buildings that were not engineered to withstand the force of colliding continental plates. (AP Photo/File)

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In this March 1964 photo released by the U.S. Geological Survey, the Government Hill Elementary School is shown destroyed by a landslide following an earthquake in Anchorage, Alaska. North America's largest earthquake rattled Alaska 50 years ago, killing 15 people and creating a tsunami that killed 124 more from Alaska to California. The magnitude 9.2 quake hit at 5:30 p.m. on Good Friday, turning soil beneath parts of Anchorage into jelly and collapsing buildings that were not engineered to withstand the force of colliding continental plates. (AP Photo/U.S. Geological Survey)