2009 could be a turning point in history for our planet.

What happens over the course of the next few months could change the lives of people everywhere, as governments meet in Copenhagen in December to work out a new climate deal.

The UN is urging you to help our planet both practically and symbolically.

This is a call to all the tree planters of the world to plant a tree to support Seal the Deal! to tackle our climate crisis, and also contribute to the Billion Tree Campaign.

When you plant a tree, you help reduce the impacts of climate change. The Intergovernmental Panel on Climate Change estimates that the cutting down of forests is now contributing close to 20 per cent of the overall greenhouse gases entering the atmosphere. Forest degradation also makes a significant contribution to emissions from forest ecosystems .

The Billion Tree campaign participants are invited to support these critical initiatives by engaging in a major tree planting drive during Global Climate Week from 21-25 September 2009. You can lodge your tree-planting pledges online here and show solidarity for a united response to climate change calling for a fair, balanced and effective climate agreement by signing the petition at www.sealthedeal2009.org.

Enter your Pledge