Leadership and Coordinated Action is Needed
For Nature to be Whole, and for People and Biodiversity to Flourish

We commit to protecting nature and preserving indispensable natural processes that support   all life on Earth. Our goal is to build an international coalition of conservation leaders across all sectors of society to coordinate on regional and international initiatives that protect and interconnect, on average, half of every terrestrial and marine ecosystem. Only then do we ensure that nature has enough space to thrive and function on our behalf.

Until now, our species has only ever known a planet permeated by abundant and intact nature. Nature is essential (and has been a prerequisite) for the fulfillment of humanity’s most fundamental needs, the realization of our ingenuity, and the restoration of our spirits. It is time for society to fully embrace the essential role of nature in our lives and preserve its integrity for the benefit of all.

The Nature Needs Half Declaration affirms that it is the urgent responsibility and moral obligation of all nations to respect nature and preserve its vital functions which requires, on average, 50% of all land and seascapes protected and interconnected by 2050 to maintain Earth’s biodiversity and life-giving services.

We offer our full support to the growing number of communities at risk of losing traditional territories and lifeways to the destruction of their natural environment. We also stand in solidarity with the many practitioners of the best modern and traditional science who conclude that half the land and water must be protected to conserve ecological services, and to provide life support.

International recognition for the needs of nature is already accelerating. By 2020, at least 17% of all land and 10% of all marine areas will be conserved. But those percentages are insufficient and are not based on any scientific assessment of the extent of conservation required to preserve a healthy planet and people. Seventeen percent is not a science-based level of protection that will achieve representation of all species or ecosystems. Only where protected land is large, connected, and distributed across diverse habitats do threatened and functionally important species thrive. We are committed to tripling the percentage of areas currently protected. Conservation science is conclusive: Nature Needs Half.

We recognize that by organizing collectively, rather than acting in a fragmented fashion, under this principle we are a more effective force for the protection of nature. By working together under this principle we increase our chances of ending the biodiversity crisis and transforming the relationship between nature and society.

We call for others to join our network and align new and existing conservation efforts and investments with our movement to embrace the many, but ever diminishing, opportunities to defend nature and all life on Earth.

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African Conservation Foundation

Art for Conservation

Biodiversity for a Livable Climate

Canadian Environmental Grantmaker’s Network

Canadian Parks and Wilderness Society

Canadian River Expeditions

The Center for Large Landscape Conservation


Conservation Atlas

Environmental Communications Associates

First Light Films

Foundation Earth

Frankfurt Zoological Society

The Fund for Sustainable Tomorrows

International League of Conservation Photographers

Koshi Tappu Kanchenjunga Biodiversity Education Livelihood Terra-Studio

Large Herbivore Network

Nahanni River Adventures


Rewilding Europe


Rock Environmental, LLC.

Sanctuary Asia

Scotland: The Big Picture

Weeden Foundation

WILD Foundation

Wild Europe

Wilderness Foundation Global

Wilderness Foundation Europe

Wilderness Foundation Africa

Wild Sight

Wildlife Trust of India

Wild Wonders of China

Yellowstone to Yukon

Yukon Conservation Society

Zoological Society of London


The Nature Needs Half (NNH) movement was launched in 2009 at the 9th World Wilderness Congress, informed by a growing scientific consensus and the millennia-old wisdom and traditional science of Indigenous Peoples. Its intent is to activate and continually energize international collaboration that results in protection of 50% of the planet by 2050 (50 by 50). For this reason, NNH is a force-multiplier, fostering opportunities to efficiently work together across political and institutional boundaries on common goals and objectives, achieving more with the same amount of effort. It also serves to build awareness for the fact that large-scale, interconnected protected areas are the cornerstone of biodiversity conservation, and spur greater international leadership and economic commitment for the protection of wild nature.