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To collect and study woody plants from around the world, to display them for people to study and to learn how to growthem in ways that enhance our environment, to encourage the planting and conservation of trees for a greener, healthier and more beautiful world

Connecting people with plants by conserving and researching the biological diversity of our collections and the ecosystems of the 26 latitudes; engaging our visitors in learning about plants, gardens and ecosystems; and inspiring our visitors to value plants, gardens and natural habitats.

Through our annual "Denver Digs Trees" program, we distribute and plant more than 1,000 public trees each spring. Many of these trees are planted in Denver's most underserved neighborhoods. Our volunteer "Community Forester" program trains citizens to act as stewards over Denver's urban forest. The Park People manages Denver's Gates Tennis Center -- one of the country's premier public tennis facilities. We also raise private funds for public park projects, including building renovation, landscape projects, and historic preservation of park structures.

In partnership with the City of New York and the community, the Prospect Park Alliance restores, develops, and operates Prospect Park for the enjoyment of all by caring for the natural environment, preserving historic design, and serving the public through facilities and programs. Prospect Park's 585 acres of meadows, waterfalls, forest, lakes, and athletic facilities comprise a masterwork of urban green space.

Randall's Island Park Alliance (RIPA), formerly known as the Randall's Island Sports Foundation (RISF), was founded in 1992 as a public-private partnership to work on behalf of Randall's Island Park, located in the East River between East Harlem, the South Bronx and Astoria, Queens. RIPA works with the City and local communities to provide an innovative and exciting destination through a wide range of sports venues, cultural events and environmental exploration. As the dedicated steward of Randall’s Island Park, the Alliance sustains, maintains, develops and programs the Park to support the wellbeing of all New Yorkers.

Riverlife seeks to reclaim, restore and promote Pittsburgh's riverfronts as the environmental, recreational, cultural and economic hub of the region.

The Santa Barbara Botanic Garden fosters the conservation of California's native plants through our gardens, education, and research, and serves as a role model of sustainable practices.

Wave Hill is a 28-acre public garden and cultural center in the Bronx overlooking the Hudson River and Palisades. Its mission is to celebrate the artistry and legacy of its gardens and landscapes, to preserve its magnificent views, and to explore human connections to the natural world through programs in horticulture, education and the arts.

We educate and inform people about the world's forests and trees, and their importance to all life, in order to promote a balanced and sustainable future.

Our mission at the Alliance for the Great Lakes is to conserve and restore the world's largest freshwater resource using policy, education and local efforts, ensuring a healthy Great Lakes and clean water for generations of people and wildlife.

The Alliance to Save Energy promotes energy efficiency worldwide to achieve a healthier economy, a cleaner environment and greater energy security.

The mission of the Amazon Conservation Team (ACT) is to work in partnership with indigenous people to conserve biodiversity, improve human and ecosystem health, and strengthen traditional culture in tropical America.