Double Exposure - Photographing Environmental Change

HENEY GLACIER

VALDEZ GLACIER

HUGH MILLER GLACIER

BLACKSTONE BAY

Warmer winters - 10 degrees F warmer now than in 1937 - mean more moisture in the air and more snow. But the glaciers are melting faster than the snow is falling.

The feet of all five glaciers touch Blackstone Bay. Crevasses form as the glaciers move over uneven ground.

All the glaciers that once lapped at Blackstone Bay have retreated, narrowed where they met the bay, or both. Marquette and Lawrence Glaciers have thinned significantly.

Not only are renewable energy sources less polluting, but through competition they provide incentives for traditional power production to become cleaner and more efficient. Clean energy sources introduced on a large scale (15 to 20% of the nation's energy budget by 2020), combined with new technologies and increased efficiency, could bring a savings of $18 billion to consumers. The reduction in global warming pollution would be equal to taking between 13.7 and 20.6 million cars of the road.