Describe the effects on global food webs if the suns energy could no longer reach earth

All plant life, and some would argue most energy on earth, is a result of the sun passing energy in the form of light energy. Plants consume light energy and grow, through photosynthesis.

If the suns energy no longer reached earth, the plants would not be able to photosynthesize any longer. So they would likely die. Also, it would be really cold.