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(25~27)
The earth is getting warmer with more and more greenhouse gases in the atmosphere. To
25
better understand how greenhouse gases heat up our earth, we should first know
greenhouse is a special house made of glass for plants. It holds the heat of the sun so that the
plants inside can grow better. Some gases in the atmosphere work like a greenhouse and can
keep the heat of the sun, so we call them greenhouse gases. Greenhouse gases help our earth
stay warm enough for animals and plants. In fact, 26
A
There is, however, a big problem. More greenhouse gases than our earth needs are entering
the atmosphere because of the way we live. 27
with a great number of cars, there is too
much CO2, a common greenhouse gas, and farm animals give off a lot of CH4, another
greenhouse gas. If we want to "cool down" our earth, a good start is to change our way of life,
like driving less and eating less meat.
D
gas 氣體
atmosphere 大氣層
)25. (A) how many greenhouse gases there are
(B) how long greenhouses have been used
(C) what a greenhouse is and how it works
(D) what greenhouse gases are and where they come from
【110.補考】
onoid
