2. PART B: Which detail from the text best supports the answer to part A?
O A. "These gases are nicknamed 'greenhouse gases
because of their heat-trapping effect. Without
the 'greenhouse effect, Earth would be too cold
to support most forms of life." (Paragraph 2)
OB. "Products of these fossil fuels, such as gasoline
and diesel fuel, power most of the engines that
drive cars, airplanes and ships." (Paragraph 3)
OC. "By examining air bubbles in ice cores taken from
Antarctica, scientists can go back and calculate
what the concentrations of carbon dioxide in the
atmosphere have been throughout the last
650,000 years." (Paragraph 4)
COD. "But because we've burned a lot of fossil fuels
and deforested parts of the planet, we've
increased the amount of greenhouse gases, and
as a result have changed the temperature of the
planet." (Paragraph 6)