Global Warming (Class 11 Chapter 11)

What do you mean by the term “Global Warming”?

Global warming is a gradual, long-term increase in the average temperature of Earth’s atmosphere due to the greenhouse effect. Gasses from various human activities, including the burning of fossil fuels, trap heat from solar radiation.

What is “Greenhouse Effects”?

The term greenhouse is derived from the analogy to a greenhouse used in cold areas for preserving heat. Due to the presence of greenhouse gases, the atmosphere is behaving like a greenhouse. The processes that warm the atmosphere are often collectively referred to as the greenhouse effect.

What are Chlorofluorocarbons?

Chlorofluorocarbons (CFCs) are products of human activity. Ozone occurs in the stratosphere where ultraviolet rays convert oxygen into ozone. Thus, ultraviolet rays do not reach the earth’s surface.

What are the various initiatives taken by several countries to reduce Global Warming?

The various initiatives taken by several countries to reduce Global Warming are as follows:

The most important one is the Kyoto Protocol proclaimed in 1997. This protocol went into effect in 2005, ratified by 141 nations. Efforts have already been initiated to control the emission of GHGs and to arrest the trend towards global warming.

Mention the various causes of Global Warming.

The various causes of Global Warming are : Climatic Change ; Greenhouse Effect ; Greenhouse Gases(GHGs); presence Of Carbon Dioxide and Chlorofluorocarbons.

Global warming is the long-term warming of the planet’s overall temperature. Though this warming trend has been going on for a long time, its pace has significantly increased in the last hundred years due to the burning of fossil fuels. As the human population has increased, so has the volume of fossil fuels burned.