The Environmental Protection Agency estimates that wood stoves are responsible for ________ percent of the deadliest air pollutant particles emitted in the United States?
A. 25%
B. 50%
C. 95%
D. 5%
Answer: D
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All of the following cell types are particularly prone to damage from mutation-causing agents except
A. bone marrow cells. B. cancer cells. C. cells in a developing fetus. D. brain cells.
Why are the volcanoes of Hawaii shield volcanoes the same as spreading ridges? What will be an ideal response?
Carcinogens may be difficult to identify because ________
A) there is no way to measure the carcinogenic potential of a substance B) they are the least common toxicants C) there is a long lag time between exposure to the agent and disease D) they are rare in nature E) most are invisible
Where does the majority of illegal marijuana production take place in North America?
A) Western Coasts of the United States and Canada B) Western Coast of the United States only C) Appalachian Mountains D) Rocky Mountains E) Great Plains