Friends of US-Parks

Leave No Trace: Center for outdoor ethics.

EPA - Environmental Protection Agency

WWF: World Wildlife Fund - Climate change is among the most pervasive threats to the web of life, yet we have the power to address its root causes and limit its impact on the planet. Smart energy choices made by individuals and businesses can dramatically reduce CO2 emissions and slow global warming. Without action, climate change will cause the extinction of countless species and destroy some of the world"s most precious ecosystems. WWF is a leader in the field of climate science and a persuasive advocate for emissions reductions and increases in the use of renewable energy resources and energy efficient technologies. Partnering with innovators in business and industry, WWF is influencing behavior and changing attitudes.

eNature: National Wildlife Federation

Global Warming: Understand the meaning of global warming and what you can do to help.

World Heritage: The World Heritage List includes 812 properties forming part of the cultural and natural heritage which the World Heritage Committee considers as having outstanding universal value.

World Network of Biosphere Reserves: In the UNESCO - MAB Biosphere Reserves Directory you will find information on all biosphere reserves.

NPS: National Park Service

DoI: US Department of Interior

National Parks Traveler: News, Commentary and Life in Americas National Parks.