Asfalt påvirker vejret lokalt...

New research focusing on the Houston area suggests that widespread urban development alters weather patterns in a way that can make it easier for pollutants to accumulate during warm summer weather instead of being blown out to sea.
One more reason to say asphalt affects local weather:
http://wattsupwiththat.com/2011/06/09/one-more-reason-to-say-asphalt-affects-local-weather/

Dette er der ikke noget nyt i. Det er velkendt at det er varmere i byerne, end på landet, bl.a. pga. asfaltens evne til at holde på varmen.