Photosynthesis is a very special life process occurring nowhere but within plants, algae, and plankton. These residences of Earth are not only beautiful but there abundance is necessary for the continued existence of all other life forms.
"Photosynthesis means...light-making...making powered by light."
Within the microscopic cells of all plant life on Earth, the light of the sun powers awesomely detailed molecular machines which make the food we eat and the air we breath. Without Plants, there is no life on Earth least of all for complex organisms like ourselves.