HEATKEYS

TED is a small nonprofit devoted to Ideas Worth Spreading -- through TED.com, our annual conferences, the annual TED Prize and local TEDx events.

CDC Centers for Disease Control and Prevention - Your Online Source for Credible Health Information

EPA Office of Water Home

Lenntech designs, builds and installs a wide range of odour treatment, water purification and air filtration products using UV, ozone, Ecosorb, drum filtration. Also cooling towers.

The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert co...

wiseGEEK: clear answers for common questions

The Natural Resources Defense Council works to protect wildlife and wild places and to ensure a healthy environment for all life on earth.

Reporting our world daily: original nature and science coverage from National Geographic.

Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual. Our multilingual how to manual has free step-by-step instructions on how to do all types of things.