Our planet faces many big conservation challenges. No one person or organization can tackle these challenges alone, but together we can. WWF-US For more than 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 over 1 million members in the United States and six million globally. WWF’s unique way of working combines global reach with a foundation in science, and involves action and partnership at every level from local to global to ensure the delivery of innovative solutions that meet the needs of both people and nature.