Facts about Trees in urban areas
- Asthma rates for children fall 25% for every extra 350 trees per sq km.
- Money for a new Heathrow runway could provide 22m street trees.
- 1,000 new parks could help avoid 74,000 tonnes of carbon a year.
- For every 5% of tree cover added, water run-off is reduced 2%.
- A treeless street is 5.5C (10F) warmer than a tree-lined one in hot summers.
- Property in treeless streets is worth 18% less than buildings in roads that have trees.
The above facts came from John Vidal in the Guardian.