Multiple Choice
In 1948 in Donora,Pennsylvania,the routine release of toxins into the air became a deadly fog because of
A) a chemical spill in the nearby Monongahela River.
B) greatly increased activity of the nearby industries.
C) a thermal inversion and stagnant weather conditions.
D) the failure of the chemical scrubbing systems on smokestacks.
Correct Answer:
Verified
Correct Answer:
Verified
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