When viewed through a telescope, Uranus and Neptune are distinctly bluish green in color. What gas is responsible for this striking appearance because it absorbs red light much more than blue light arriving from the Sun and more easily scatters blue light?

Answer: Methane is the gas responsible for the bluish green color.

Explanation:

Methane gas found at the surface of Uranus and Neptune strongly absorbs the red light coming from the Sun and scatters blue light more easily. Therefore methane is responsible for the striking appearance at the planets surface.