Wood smoke contains dangerous toxins that cause changes in human cells. Because wood smoke presents such a high health risk, legislation is needed to regulate the use of open-air fires and wood-burning stoves. Which of the following, if true, provides the most support for the argument above?
A: The amount of dangerous toxins contained in wood smoke is much less than the amount contained in an equal volume of automobile exhaust.
B: No significant beneficial effect on air quality would result if open-air fires were banned within the jurisdiction covered by the proposed legislation.
C: In valleys where wood is used as the primary heating fuel, the concentration of smoke results in poor air quality.
D: Smoke produced by coal-burning stoves is significantly more toxic than smoke from woodburning stoves.
Choose A, B, C or D as your solution.
C