Describe what disaster occurs on earth, if photosynthesis life process stops.

Explanation

1) Plants are the universal food providers. If they stop photosynthesis all the animals would die due to starvation.
2) Plants release oxygen during photosynthesis. It is essential for survival of all living beings. If photosynthesis does not take place, there would be no oxygen on the earth and no chance of survival of life on this planet.
3) Plants utilise `CO_2` for photosynthesis. If it does not occur, `CO_2` utilisation is stopped and hence increase in the levels of `CO_2`. This leads to global warming.