Question

Why is ecological crisis occured in modern times?

Answer 1

An ecological crisis occurs when the environment of a species or apopulation changes in a way that destabilizes its continued survival. There are many possible causes of such crisis:

It may be that the environment quality degrades compared to the species' needs, after a change of abiotic ecological factor (for example, an increase of temperature, less significant rainfalls).It may be that the environment becomes unfavourable for the survival of a species (or a population) due to an increased pressure of predation.Lastly, it may be that the situation becomes unfavourable to the quality of life of the species (or the population) due to raise in the number of individuals (overpopulation).[1]

The evolution theory  of punctuated equilibrium sees infrequent ecological crises as a potential driver of rapid evolution.

Answer 2

Answer:

These days the increase in population create great pressure on earth as well as it resources.To satisfy the needs of ever growing population systematic mining, cutting trees, and construction road took place all over the earth.Buring of fossil fuels and release of enormous amount of waste materials by industries contaminate air, water and soil.