A. The amount of dangerous toxins contained inwood smoke is much less than the amount contained in an equal volume of automobile exhaust
B. Within the jurisdiction covered by the proposed legislation, most heating and cooking is done with oil or natural gas
C. In valleys where wood is used as the primary heating fuel, the concentration of smoke results in poor air quality
D. No significant beneficial effect on air quality would result if open-air fires were banned within the jurisdiction covered by the proposed legislation