Class 9 Homework-

The greenhouse effect is caused by:

a. incoming long-wave radiation that is trapped as short-wave radiation by the atmosphere.

b. short-wavelength light that is reradiated as long-wave radiation and is trapped by certain gases.

c. heat that is stored as short-wave radiation by rough surfaces of the Earth and then re-radiated as long- wavelength light.

d. cold air masses that mix with the warm gases and produce warm atmospheric gases.

e. reactions in the stratosphere between these greenhouses gases and ozone, producing long-wave heat.

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