Urban Trees Reduce Air Pollution
Every year 3 Million premature deaths are linked to outdoor air pollution.
It is the world's greatest health risk.
Architect Stefano Boeri, designer of the first "vertical forest" in Milan, argues that trees and forests absorb nearly 40% of man-made fossil fuel emissions.
Dr David Novak, a senior scientist at the US Forest Service, estimates that urban trees only reduce air pollution by 1%.
Either way, both strongly emphasise the enormous health benefits of even a small reduction in urban pollution - backed-up by the article below on asthma in tree-lined neighbourhoods."
Asthma attacks reduced in tree-lined urban neighbourhoods
People living in polluted urban areas are far less likely to be admitted to hospital with asthma when there are lots of trees in their neighborhood, a new study has found.
The study into the impact of urban greenery on asthma suggests that respiratory health can be improved by the expansion of tree cover in very polluted urban neighbourhoods.
The study, published in the journal Environment International, looked at more than 650,000 serious asthma attacks over a 15 year period.
In the most polluted urban areas, trees had a particularly strong association with fewer emergency asthma cases. In relatively unpolluted urban neighbourhoods trees did not have the same impact.