Almost all life on Earth runs, directly or indirectly, on energy from the Sun collected by photosynthesis. Take away the photosynthesizers, i.e. the green plants, and the vast majority of animals lose their food source. read more
The energy we get from our food ultimately comes from the sun. It is the plants which convert the solar energy to chemical potential energy via a process called photosynthesis. Without the plants, we would be unable to get the energy from the sun. read more