Temperature differences between areas with cities and others with vegetation in continental USA (Image NASA's Earth Observatory)

An article published in the journal “Environmental Research Letters” describes a NASA research that used data collected by various satellites to assess the impact of American cities on the rise in temperatures. The conclusions are that in large cities the temperature is from 1° to 3° Celsius (1.8 to 5.4°Fahrenheit) higher than that of the neighboring areas rich in vegetation.