World Environment And Ecology MCQ Question and Answer | Geography MCQ Question

Earth Summit was organised by UNCED i.e. United Nations Conference on Environment and Development in Rio de Janeiro, Brazil in the year 1992. It is also known as Rio Summit and Rio Conference.

World Environment Day is held each year on June 5. It is one of the principal vehicles through which the United Nations (UN) stimulates worldwide awareness of the environment and enhances political attention and action.

Environment includes both Abiotic and Biotic component. Biotic describes a living component of an ecosystem. Abiotic components are non-living chemical and physical factors in the environment which affect ecosystems.

Biosphere is the single largest ecosystem of the earth. Simply, biosphere is known as the sum of all ecosystems also known as the ecosystem also the zone of life on earth.

For Ecological balance, it is necessary to secure a large area for forest. In order to maintain ecosystem on land area where human beings have already damaged most of the habitats especially forest biomes, ecological balance can only be maintaine by increasing forest area.

Among the following climatic factors, Wind has the least effect upon a terrestrial ecosystem. A terrestrial ecosystem is a type of ecosystem found only on biomes. Seven primary terrestrial ecosystems exist: tundra, taiga, temperate deciduous forest, tropical rain forest, grassland, deserts add more information regarding each of these ecosystems.

Soil is eroded heavily due to deforestation, it affects the flowing of surface water badly. Ecological System is badly affected by these causes. An ecosystem or ecological system is the base of habitats of species. In an ecosystem biotic beings (living organisms) interact with abiotic beings (non living things). Deforestation leads to soil erosion vanishing the habitats thus damaging ecosystem.

The biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere. The biosphere is the narrow zone which supports life.This realm contains all the living organisms found on earth.

Due to global warming, glaciers in polar regions are melting rapidly and consequently sea level is increasing. Rapid increase in sea level lead to inundation of coastal areas by sea water changing coastline. The overall climate world over has been affected by global warming leading to change in crop pattern.

Carbon Dioxide is the cause of 'Green house effect. As CO2 shows green house tendency i.e. it allows the solar light to reach earth but does not allow it to escape back into space & leads to global warming (Green house effect)through rise in temperature.