The dashed line on the graph shows the variation with wavelength of the intensity of solar radiation before passing through the Earth’s atmosphere.

The solid line on the graph shows the variation with wavelength of the intensity of solar radiation after it has passed through the Earth’s atmosphere.

Which feature of the graph helps explain the greenhouse effect?

A.     Infrared radiation is absorbed at specific wavelengths.

B.     There is little absorption at infrared wavelengths.

C.     There is substantial absorption at visible wavelengths.

D.     There is little absorption at UV wavelengths.

A