He was unable to ______ the police that he had been elsewhere at the time of the crime.

A．mean a warming up in the Arctic
B．raise the temperature of the earth's surface
C．prevent the sun's rays from reaching the earth's surface
D．account for great changes in the climate in the northern hemisphere

A．the climate of the world should be becoming cooler
B．the new Ice Age will be delayed by the greenhouse effect
C．the man-made warming effect helps to increase the solar effects
D．it will take thousands of years for the inertia of the earth's climate to take effect