Earth Terrestrial 12742 5.972e24 365.25 0-12 The lowest layer of Earth's atmosphere where weather occurs. 12-50 Contains the ozone layer that absorbs and scatters ultraviolet solar radiation. 44579000 4600000000 Beijing 30370000 1340590000 Cairo 24709000 579000000 Washington, D.C. 17840000 430000000 Brasília 14000000 1100 None 10180000 741400000 Brussels 8600000 26000000 Canberra 168723000 11034 85133000 8435 70560000 7450 21000000 7230 15000000 4080