3. 'Global warming' is an expression which refers to the effect of human
activities that produces the unnatural change on the climate. It is an increase in
earth's temperature due to burning of fossil fuels (coal, oil and gas) and large-
scale deforestation, which results in emission of large amounts of 'greenhouse
gases' to the atmosphere.
What is Global Warming?
Now the Question arises that, what causes Global Warming?
increasing concentrations of greenhouse gases (such as
carbon dioxide and methane) in the atmosphere from
human activities such as burning fossil fuels for energy.
4. CAUSES OF GLOBAL WARMING
According to Scientists and Government organisations, Concentration of
Greenhouse Gases in the atmosphere due to greenhouse effect is the major
causes of Global Warming. These gases especially CO2 have heat trapping
capability. So they trap heat and cause the greenhouse effect, rising global
temperatures.
5. Some of the main Causes of Global Warming are:
Greenhouse
Effects
• The greenhouse effect is the
process through which heat is
trapped near Earth's surface by
substances known as 'greenhouse
gases.' Imagine these gases as a cozy
blanket enveloping our planet,
helping to maintain a warmer
temperature than it would have
otherwise.
6. Greenhouse Gases
•
Greenhouse gases mainly comprises of
carbon dioxide, methane, and nitrous
oxide. These gases are lighter than air,
so they rise up to the outer limits of the
earth's atmosphere and settle up there,
making an impenetrable barrier that
traps heat from escaping out into the
space, and keeping it within our
environment, and increases the
temperature.
7. • Agriculture Agriculture produces large amount of
methane and nitrous oxide
worldwide, as accounted by IPCC.
There are numerous agricultural
sources of greenhouse gases.
Livestock grazing, waste
management and digestive gases
contribute half of the emissions
produced by agriculture. Nitrogen
fertilizers (used for increasing
production) release nitrous oxide and
comprise 35 per cent of agricultural
emissions.
9. There are Numerous Effects of Global Warming. Some of the effects of global
warming observed across the world are:
• Rise in Sea Levels
Due to rise in temperature, the Glaciers present in polar
regions are melting rapidly, as a result there is sufficient
rise in sea level.
10. Droughts and Floods
•
Higher temperature leads to faster evaporation of water and leads to
drought in one part, and heavy rainfall causes flooding in other part
of the world. Experts have estimated that, drought conditions might
be increasing by at least 66 percent in upcoming years.
