问题：
[不定项选择题] The molecules of carbon dioxide in the Earth’s atmosphere affect the heat balance of the Earth by acting as a one-way screen. Although these molecules allow radiation at visible wavelengths, where mos
A、Fossil fuels were burned for the first time.
B、Greater amounts of land were cleared than at any time before.
C、The average temperature at the Earth’s surface has become 2℃ cooler.
D、The amount of carbon dioxide in the atmosphere has increased measurably.
参考答案：
D、The amount of carbon dioxide in the atmosphere has increased measurably.
● 参考解析
