The Cooling Effects of Atmospheric Aerosols Are Much Weaker Than

Multiple Choice

The cooling effects of atmospheric aerosols are much weaker than the warming from an enhanced greenhouse effect for all of the following reasons except:

A) aerosols such as sulfur haze typically remain in the atmosphere for about a year whereas greenhouse gases remain for hundreds of year
B) greenhouse gases help warm the planet 24 hours a day whereas sulfur haze cools the Earth only during the day when the sun is shining
C) there has been a concerted effort to increase sulfur emissions to counter the effects of the enhanced greenhouse effect but sulfur emissions are hard to produce
D) no exceptions - all of the statements are true