There, Likens discovered the existence of acid rain in North America and the threat it posed to woodlands and waters. Dr. Likens' research interests are focused on long-term, multidisciplinary studies of forest, stream and lake ecosystems in the Hubbard Brook Experimental Forest in the White Mountains of New Hampshire. The objectives are to evaluate energy flow and biogeochemical fluxes for northern hardwood forest ecosystems and a small lake. E Dr. Likens also studies effects of acid rain on natural ecosystems, evaluating the effect of human activities on historical changes in precipitation chemistry, the chemistry of precipitation in remote regions of the southern Hemisphere, the chemistry of cloud water, and the ecology and biogeochemistry of aquatic ecosystems. Click here to learn more about Dr. Likens and his work with the Institute of Ecosystem Studies .
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A ticket is required. Click here to find out how to get them . Dr. Shiva is a world-renowned environmental thinker and activist. In 1991, she founded Navdanya , a national movement to protect diversity and integrity of living resources. Navdanya sets up community seed banks, supports conversion to organic agriculture, and is establishing direct producer-consumer links for food security and safety.