Describe briefly three of the most important periods of time in the evolution of life on the plan, giving examples of organisms that existed during that time and the major events that led to their demise. Why is the date 65.5 MB so crucial to the development of Life and existence on Earth?

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.