By A Mystery Man Writer
An effect called the "urban heat island" means that temperatures are often 10 degrees higher in cities due to the heat absorption and retention of materials like asphalt and concrete.
Rooftop gardens can help reduce heat in cities, new study shows - Travel Tomorrow
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Cities and Urbanization
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With Eye on Climate Change, Chicago Prepares for a Warmer Future - The New York Times
Rooftop gardens can help alleviate heat in cities, study finds - Big Think
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