In some areas, indoor air pollution is worse than outdoor air pollution.
Answer the following statement true (T) or false (F)
True
The World Health Organization estimates that 2.4 million people die each year from air pollution and that 1.5 million of those are caused by indoor air pollution.
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The largest-scale ecosystem is called a ___________________.
Fill in the blank(s) with the appropriate word(s).
How do worms help plants grow?
A) They are a source of minerals. B) They carry out chemical reactions that convert carbon dioxide to nitrogen. C) They decompose organic material into compounds plants can use. D) They add excrement, a source of nutrients, plus they produce air space by crawling through the soil.
Slow mass movements
A)are undetectable B)do not transport as much material as fast mass movements C)are characterized by tilted trees and cracked foundations D)are characterized by talus piles E)occur only on steep slopes
This city typically has the worst pollution in the United States: ________
Fill in the blank(s) with the appropriate word(s).