March 29, 2008 The popularity of Antarctic cruises is partly due to so-called doomsday tourists — people who want to see the continent's coastline before warmer temperatures melt the ice. But the growing traffic may actually help defend the continent from environmental threats.
October 11, 2007 Flying is the fastest way to reach your destination — and it's not the worst option for the environment, researchers say. Although commercial airplanes are responsible for 3 percent of the world's greenhouse gas emissions, driving would be worse.
May 4, 2007 Which continents emitted the most carbon dioxide over the past century? What's better for the environment, keeping your old car or buying a hybrid? What about compact fluorescent light bulbs? We get answers to these questions, and more, that were submitted by phone and e-mail.