Question 42 0 out of 3 points what is the main source

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Question 42 0 out of 3 points What is the main source for Nitrogen oxides (NOx) in the atmosphere?
Question 43 3 out of 3 points The gas found in the highest proportion in the atmosphere is _______.
Question 44 3 out of 3 points Which room in your house is most likely to have mold, an indoor air pollutant that can trigger asthma attacks and allergic reactions?
Question 45 3 out of 3 points Poor indoor air quality due to burning of unvented heating and cooking fires is dangerous for children under 5, and accounts for more than half of the cases of _________, a common disease in children of this age.
Question 46 3 out of 3 points The World Health Organization estimates that ______ people (mostly in developing nations) die from unhealthy indoor air conditions every year.
Question 47 3 out of 3 points Air pollution is always caused by human activities.
Question 48 3 out of 3 points
Acid rain does not impact the chemistry of surface waters because they are ALL buffered by dissolved minerals.
Question 49 3 out of 3 points Which common disease is NOT included in the suite of diseases of COPD (chronic obstructive pulmonary disease)?
Question 50 0 out of 3 points Which common air pollutant is a primary damager of crops (including cotton, a large crop in AZ!)?

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