Or the first time in five years California authorities have issued a first stage smog alert, warning people in some areas of unhealthy levels of ozone in the air. Smog contains several dangerous chemical compounds beside ozone: sulfur dioxide, nitrogen dioxide, and carbon monoxide. Since it would be impossible to wear gas masks like those in the picture, a reasonable plan would be to
A) stay indoors as much as possible to limit exposure during the alert.
B) wear cotton surgical masks outside to prevent exposure.
C) move to another state to avoid exposure.
D) distribute portable oxygen masks to all citizens.

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explanation:

answer; i believe the answer is hydraulic action;

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

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