Simplify the following text for a Grade 11 native English-speaking person.
Original: The Worldwatch Institute is a globally focused environmental research organization based in Washington , D.C. Worldwatch was named as one of the top ten sustainable development research organizations by Globescan Survey of Sustainability Experts . The Worldwatch Institute helps to inform policymakers and the public about the complex links between the world economy and its environmental support systems .
Simplified: The Worldwatch Institute is an environmental organization based in Washington , D.C. .