When we think of air pollution we immediately think of the ways man has contributed to its accumulation over the decades. But some air pollution is the result of natural activities. Review the common types of air pollution and choose ALL the pollutants
which are the result of both natural AND man-made processes.
A)
radon
B)
methane
nitrogen dioxide
D
particulate matter
E
polychlorinated biphenyl
im

methane, nitrogen dioxide, and particulate matter

Explanation:

did it on USA test prep

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

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