Urban trees cool the world’s cities more than we thought – but we can’t rely on them alone
- Written by Manuel Esperon-Rodriguez, Researcher in Urban Transformation, Western Sydney University
Oliver Strewe/The Image Bank/GettyCities and towns are usually 1–3°C hotter than the surrounding countryside, because asphalt, concrete and brick absorb heat from the sun and radiate it slowly. Some cities can be as much as 7°C hotter. This effect is known as the urban heat island.
This can be dangerous, especially in hot countries....
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