Glacier Meltdown - DVD

For 30 years, Lynn Davis has photographed the magnificent icebergs of Greenland. Davis returned recently with climate change expert Tony Leiserowitz, where they take in the meltdown, and explore the implications for the planet.

For centuries, Inuit in the Arctic have lived on and around the frozen ocean. Now, as climate change is rapidly melting the sea ice between Canada and Greenland, development here threatens to upset the delicate balance between their communities, land and wildlife.

The idea that a building's walls will stand up seems as safe a bet as gravity's pull or the sun's rising. Most of us don't worry much about whether our apartments, offices, supermarkets, or schools are going to collapse on us as we go about our daily routines. But should we? National Geographic takes a look at buildings around the world that despite having appeared structurally sound, some for years on end, came crashing down in a momen