Ecosystem: An Ecosystem is a complex set of relationship among the living resources habitats and residents of an area but changing global pattern of land use have had a significant negative effect on ecosystem.

There is a biotic balance in an ecosystem, which makes it possible to sustain the various interdependent members (plant and animal life). Ecosystem maintains a very delicate balance. Various human activities have been done to disrupt this balance and destroy the world’s ecosystems.

1. Industrialisation: 

1. Industrialisation has resulted in emission of green house gases into the atmosphere, leading to rise in global temperature. 

2. Industrialisation has led to water pollution due to flow of chemical and industrial effluents into rivers and other water bodies.

2. Automobiles: 

1. Automobiles emmits several million tons of gases each year into the atmosphere which causes air pollution and damage to human heath. 

2. Transptation activities has an adverse impact on hydrological conditions and water quality. Fuel, chemical other hazardous particulate mixed in water and pollute it.

3. Dwelling Houses: 

1. Urban development and rapid construction is continously removing soil nutrients, surface vegetation and trees that filter the air and equalize the carbon cycle. 

2. Urbanization also displaces animals and causes serious migratory obstacles for animals and replaces native plant with impermeable concrete.