Question

What is the greenhouse effect? Write its two control measures.

Answer 1

Hint: Heat of sun near Earth’s surface is trapped by atmosphere, which keeps Earth Warm. Carbon dioxide majorly contributes to global warming. Automobiles increase global warming. Green cover can be increased by planting more plants.

Complete step by step answer:
-Earth’s surface absorbs 75% of solar energy reaching the Earth which leads to increase in temperature. Rest of heat is radiated back to the atmosphere.
-Carbon dioxide, methane, ozone, CFC and water vapour present in the atmosphere traps some of the heat, so this adds heat to the atmosphere which leads to global warming.
- Glass covered areas are used to grow Cold places flowers, vegetables and fruits. This glass covered area is called a greenhouse.
-We are surrounded by atmosphere which maintains temperature of Earth constant, glass in greenhouse holds warmth of sun, similarly Heat of sun near Earth’s surface is trapped by atmosphere, which keeps Earth Warm. This is the Natural Greenhouse effect.
- The natural greenhouse effect maintains temperature. In a greenhouse, solar radiations can pass through transparent glass which heats up soil and plants.
Infrared radiation is emitted by soil and plants. infrared radiations cannot pass through glass, they are partly absorbed and partly reflected. This traps the energy of the sun in the greenhouse. In the same way, Carbon dioxide is transparent to sunlight and its heat is also trapped by carbon dioxide, so if there is an increase in the amount of carbon dioxide, natural greenhouse balance is disturbed, Carbon dioxide majorly contributes to global warming.
-It can be controlled by reducing use of automobiles and planting more trees.

Note: Carbon dioxide is transparent to sunlight and its heat is also trapped by carbon dioxide, so if there is an increase in amount of carbon dioxide, natural greenhouse balance is disturbed, Carbon dioxide majorly contributes to global warming. It can be controlled by reducing use of automobiles and planting more trees. Use of Bicycles and carpools should be used whenever possible.