Why is an ecological crisis created in modern times? What are its effects?

An ecological crisis occurs when there is a change in the environment of a particular species that reduces the chances of its continued survival.

The ecological crisis is created in modern times due to the following reasons:

1. Degrading quality of the environment

2. Increase in population

3. Global warming

4. Deforestation

5. High level of pollution

6. The increased pressure of the predators

7. The extreme level of climate change

The ecological crisis has led to the extinction of various species and other unfavorable conditions. For example, Permian-Triassic extinction event 250 million years ago, Cretaceous–Paleogene extinction event 66 million years ago, ozone layer depletion, volcanic eruption and the nuclear meltdown in Chernobyl in 1986.