The climate becomes colder when the amount of dust at high altitudes in the atmosphere increases. There are several ways that dust may get into the atmosphere. Volcanic erutions can add so
much dust that sunlight is scattered back to outer space. Chimneys, especially industial smokestacks, also throw large amount of dust into the atmosphere. The burning of tropical forests to clear land for farming is another way the amount of airborne dust is incresased. Finally, should a nuclear
war ever occur, it might add so much dust ot the atmosphere that it could cause a new ice age --- a nuclear winter in which the climate becomes so cold that no new crops can be grown.
In general the major details of this paragraph are ____.
A、reasons why dust in the atmosphere makes the climate colder.
B、natural causes of dust getting into the atmosphere.
C、ways that industry puts dust into the atmosphere
D、ways that dust may get into the atmosphere.
much dust that sunlight is scattered back to outer space. Chimneys, especially industial smokestacks, also throw large amount of dust into the atmosphere. The burning of tropical forests to clear land for farming is another way the amount of airborne dust is incresased. Finally, should a nuclear
war ever occur, it might add so much dust ot the atmosphere that it could cause a new ice age --- a nuclear winter in which the climate becomes so cold that no new crops can be grown.
In general the major details of this paragraph are ____.
A、reasons why dust in the atmosphere makes the climate colder.
B、natural causes of dust getting into the atmosphere.
C、ways that industry puts dust into the atmosphere
D、ways that dust may get into the atmosphere.