How close are you to a CFC molecule right now?
A)It depends upon whether you are in an urban or rural setting.
B)There are about 25 trillion of them in each liter of air you breathe.
C)There are about 25 million of them in each liter of air you breathe.
D)There are about 25 of them in each liter of air you breathe.

Question

Quizplus · Accepted Answer

CFCs are found in the atmosphere, and their concentration varies depending on location. In urban areas, there are typically more CFCs than in rural areas. The correct answer is B because it states that there are about 25 trillion CFC molecules in each liter of air we breathe.

How Close Are You to a CFC Molecule Right Now