climate change

Science, Tech & Environment

The UN climate summit opens with a voice from an endangered nation

Leaders from all over the world have gathered in New York to attend the UN Climate Summit. The first thing they heard was an impassioned poem from a mother and activist from the Marshall Islands, a tiny nation in the Pacific that may no longer exists if climate change isn't halted.

Science, Tech & Environment

Geo answer

The answer to today's Geo Quiz is Ellesmere Island. An international dog sled expedition led by explorer Will Steger is currently crossing the island in an effort to document the effects of climate change.

Global Politics

Mobilizing to combat climate change

Like Franklin Delano Roosevelt, President elect Obama is facing tough economic times, and an industrial challenge. While Roosevelt mobilized industry to fight a war, Obama pledges to mobilize to battle climate change. The World's Jason Margolis has more.

Arts, Culture & Media

The causes of famine

Droughts and floods can cause food crises. But so can politics and economics. Reporter David Hecht examines the roots of the 2005 food crisis in the West African nation of Niger and why so many children starved to death despite an adequate harvest.