Shopping may put a dent in your wallet, but it doesn't have to harm the Earth. Here are tips on keeping the environment in mind as you roam the grocery aisles.
Carbon dioxide released from burning fossil fuels is a prime suspect in global warming. Could we mitigate the problem by burying the CO2 deep within the ocean? See more »
What's a good way to make solar power affordable? Find a way to generate more electricity in a smaller area. You can do it -- just concentrate. See more »