Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation, acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's).
-
Aacting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate
分析该选项
-
Bacting as a global thermostat and thus keeping Earth either from burning up or freezing over, while also accelerating
分析该选项
-
Cact as a global thermostat and thus keep Earth from either burning up or freezing over, while also accelerating
分析该选项
-
Dthey act as a global thermostat that thus keeps Earth either from burning up or freezing over, even though it also accelerates
分析该选项
-
Ethey act as a global thermostat to thus keep Earth from either burning up or freezing over, but they also accelerate
分析该选项