In many developing countries a primary indoor air pollutant is ________
A) VOCs
B) cigarette smoke
C) smoke from wood-fueled stoves
D) asbestos
E) radon
C
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What is a result when birth rates and death rates reach equal numbers?
A) biocapacity B) changing demography C) demographic transition D) zero population growth E) baby boom
The gradual loss of heat through the Earth's surface is called ________.
A. thinning of the heat B. thermal decay C. convection D. heat flow E. cooling trend
Why is the air over an open flame always moist?
A. One of the products of combustion is water vapor. B. The hot flame vaporizes the water in the air above the flame. C. Warm air contains more humidity than cold air. D. None of the above is true.
The introduction of exotic species into a freshwater ecosystem generally increases the population of the native species.
Answer the following statement true (T) or false (F)