This is the general term used for a mixture of solid particles and liquid droplets found in the air.
A) particulate matter B) volatile organic compounds
C) smog D) acid precipitation
Question 2
Thomas Malthus concluded that
A) population increased arithmetically while food production increased linguistically.
B) the world's rate of population increase was higher than the development of food supplies.
C) so-called moral restraint was producing lower crude birth rates.
D) population growth was outpacing available resources in every country, according to algebraic calculations.
E) crude birth rates must balance crude death rates.
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