sustainability

Business, Finance & Economics

Africa's food supply

The United States recently joined other leading industrial nations to pledge 20 billion dollars towards improving farming in Africa. But as The World's Gerry Hadden reports from Morocco, some Africans are wary of this latest round of help from outside.

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.

Science, Tech & Environment

The downside of biofuels

Washington has touted the increased use of biofuels, such as ethanol, as a way to reduce carbon emissions, but a study published today suggesting boosting the use of biofuels also poses some environmental hazards, as The World's Jason Margolis explains.

Global Politics

US could tap Canada's oil supply

Canada's oil sands could become the number one source of US oil imports this year, even though it is expensive and environmentally costly. Anchor Marco Werman speaks with energy expert Daniel Yergin of Cambridge Energy Research Associates.