Question

why is destroying our eco system major threat to human being.explain any three reasons.

Answer 1

Human beings are an integral part of the ecosystem together with species of plants and animals. Human activities have largely been responsible for disturbing balance of nature, bringing changes in the climatic conditions, thereby creating ecological imbalance. Destruction of ecosystem is a major threat to human survival as it leads to the following:

a. Extinction of species - Pollution, deforestation, activities like hunting, poaching, killing animals for skin and flesh have brought about extinction of many plants and animals who play an important part in maintaining balance of nature.
b. Climate change : Human activities have resulted in various phenomena like global warming and melting of glaciers. This is resulting in an overall change in the temperature and climate of earth and its environment.Phenomena's like floods, landslides, Tsunami are the result of increase in the sea water level primarily caused due to global warming, melting of glaciers. Deforestation for instance, disturbs the normal cycling of water and nutrients in the environment. Also, it is a cause of global warming as carbon dioxide concentration is increasing with time.
c. Depletion of ozone layer : Human activities have resulted in increased pollution of all natural resources like water, air, etc. Various chemicals like chlorofluorocarbon result in depletion of ozone layer. The depletion of the layer is resulting increased exposure to UV rays.