Part B 21. Which quotation supports the answer in Part A?
A "Different specialists describe the particles based on shape, size, and chemical composition
The media often uses everyday terms that hint at aerosol sources, such as smoke, ash, and
soot." (paragraph 2)
B "Deforestation, overgrazing, drought, and excessive irrigation can alter the land surface,
increasing the rate at which dust aerosols enter the atmosphere. Even indoors, cigarettes,
cooking stoves, fireplaces, and candles are sources of aerosols." (paragraph 8)
C "The Sun provides the energy that drives Earth's climate, but not all of the energy that
reaches the top of the atmosphere finds its way to the surface. That's because aerosols and
clouds seeded by them-reflect about a quarter of the Sun's energy back to space."
(paragraph 9)
"In 1991, the eruption of Mount Pinatubo in the Philippines ejected more than 20 million tons
of sulfur dioxide-a gas that reacts with other substances to produce sulfate aerosol-as high
as 60 kilometers (37 miles) above the surface, creating particles in the stratosphere."
(paragraph 12