The measurable benefit of trees
23-Mar-09 |
Environment | Design
Among the measurable benefits of trees cited:
- 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.
