As the world's population balloons to almost 7 billion, it's becoming more difficult to find a place on Earth unaffected by man-made pollution.
These 13 animals have been rediscovered in modern times, sometimes after being considered extinct for millions of years.
See this gallery of NASA photos of the Earth's major cities. It'll give a whole new perspective on how urban growth is affecting the planet.
It's not your average science fair when the 16-year-old winner effectively solves a global waste problem.
Forget the debate over whether you should get the H1N1 vaccine. Here's what you can eat to boost your immune system.
Meet the new crop of American farmers — young and energetic idealists who are bringing local, sustainable food back to the table.
A sea of plastic bags and bottles is growing in the Pacific Ocean. Is there anything we can do to stop it?
With a face like that and the odd habit of bouncing along the ocean floor like a rubber ball — it's no wonder.
Gaiam announced that bottles previously labeled "BPA-free" in fact leached BPA at nearly 20 times the level of a SIGG bottle. (It wasn't a good year for water bottle makers.)
The economic downturn had one positive effect — it changed the way people got around.