The world 's leading conservation organization , WWF works in 100 countries and is supported by 1.2 million members in the United States and close to 5 million globally .
World Wildlife Fund : For 50 years , WWF has been protecting the future of nature .
The world 's leading conservation organization , WWF works in 100 countries and is supported by 1.2 million members in the United States and close to 5 million globally .
World Wildlife Fund : For 50 years , WWF has been protecting the future of nature .