Describe Why Cities Are Generally Warmer Than Surrounding Rural Areas

Q48: Since the _ of 1970, emissions of

Q49: Because of increased industrialization, by the 1850s

Q50: The primary source for all pollutants is

Q51: Air pollution emitted from industrial areas, especially

Q52: Wet deposition, when particles and gases are

Q54: An air quality index value of 35

Q55: Nitrogen dioxide (NO₂)reacts with _ in the

Q56: The term _ matter represents a group

Q57: The formation of _ begins when ultraviolet

Q58: Strong winds tend to _ the concentration