Volcanoes Are an Important Natural Source of

Q32: List some of the ways that pollutants

Q33: Once released into the atmosphere,chlorofluorocarbons remain about<br>A)

Q34: Collectively,particles of soot,smoke,dust,and pollen are called<br>A) hydrocarbons.<br>B)

Q35: The smoke in London smogs came primarily

Q36: What causes acid rain? What are some

Q38: Rain with a pH of 5.6 would

Q39: A mixing layer is characterized by<br>A) enhanced

Q40: Describe how the use of a tall

Q41: The term "ozone hole" refers to a

Q42: Sunshine in a city is typically less