The United States has more vehicles per capita than any other country,but cleaner air than many other countries because it
A) has more electric vehicles.
B) has fewer people living in cities.
C) has more governmental regulations on air quality.
D) is a large country so pollutants can spread out more.
Correct Answer:
Verified
Q11: Which substance is an element?
A)NO2
B)NaCl
C)N2
D)CH4
Q23: Ozone is a secondary pollutant.A secondary pollutant
Q24: Which of the following would be described
Q27: Choose the proper coefficients for each substance
Q33: Which is the balanced chemical equation showing
Q38: Which symbols represent only elements that are
Q39: P2O5 is the chemical formula for
A)pentoxygen diphosphide.
B)diphosphorus
Q40: Which square(s)contain(s)only an element? Q41: During a chemical reaction, Q45: Which diagram(s)best represent(s)only molecules? 
A)atoms are rearranged.
B)some atoms
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