It's autumn and many trees are putting on a beautiful show of colour for us, so I wanted to take the opportunity to celebrate all the other things that trees do for us - just in case you still need to be convinced that planting trees is a good idea! I offer a few good reasons here (can you think of any more?). Remember that most of the trees we’re enjoying today were planted for us by our ancestors. Now it's our turn.
1. Trees make oxygen. Okay, I’m starting with the obvious ones, but without the miracle of photosynthesis we would not be here at all. It’s important to remember though that trees and plants need us just as much, to replenish atmospheric carbon dioxide.
2. Trees sequester carbon. I’m sure we all appreciate the importance of that right now, but throughout the history of Life on Earth, the ability of photosynthesisers to take carbon out of the air and reduce greenhouse gases has kept the global temperature ‘just right’, despite our sun increasing in temperature by around 25%.
3. Trees shade us from the hot sun. Yes, I know it rarely gets that hot in Britain, but there are still days when we seek out shade and trees provide it well. Grazing animals, when they have access to trees, always seek out their shelter too.
4. Trees shelter us from the rain. They shelter everything else beneath their canopy too, including, and especially, the soil. In woodlands their leaf fall provides a carpet that slows water before it hits the soil itself, allowing it to percolate in rather than run off.
5. Trees slow water run-off. Where we do find run off (from fields or hard surfaces), trees can slow it and again allow it to percolate down into the soil. The root buttresses of trees act like mini dams that catch water –and the slower the run off, the less chance there is of flooding occurring downstream.