Climate Questions: Does what I do matter?

Can people's individual actions make a difference in how much carbon dioxide is emitted on an international scale? International organizations like the United Nations have called on individuals to limit their carbon footprint ...

EXPLAINER: How China got blue skies in time for Olympics

The blue skies greeting Olympic athletes here this month are a stark change from just a decade ago when the city's choking air pollution was dubbed an "Airpocalypse" and blamed for scaring off tourists.

Can we feed billions without wrecking the planet?

We are now producing more food more efficiently than ever, and there is plenty to go around for a human population of 7 billion. But it is coming at a drastic cost in environmental degradation, and the bounty is not reaching ...

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