Message from Achim Steiner, UNEP Executive Director

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The oldest living organisms on Earth are trees. Nearly all forms of land-based life depend upon trees in one way or another. Even the way we view the world owes so much to trees. People speak of having roots. Our families are organised into trees and branches. Businesses use seed capital to take root and spread out. Occasionally we go out on a limb, and sometimes, of course, we cannot see the wood for the trees.>> read more

A call to action

We have but a short time to avert damaging and economically debilitating climate change. We also have all the economic, intellectual and technological know-how to head off this calamity and avoid the disruption and misery that inaction would entail.

The solutions are numerous and, as many economists say, affordable when compared with the costs of complacency >> read more

Trees - Our Anchor for Life

It is rare that a simple action can be so infectious and effective, yet the act of planting a tree as part of UNEP's Billion Tree Campaign has catalysed a collective, powerful response among citizens, communities and governments around the world >> read more

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