GLOBAL
WARMING
P R E S E N T E D BY :
S H A L I N I S H A R M A

CONTENTS
• What is Global Warming
• Greenhouse Effect
• Causes of Global Warming
• Effects of Global Warming
• Precautions to Prevent Global Warming

WHAT IS GLOBAL WARMING
• Global warming is when the earth heats
up and the temperature increases.
• More recently, the temperatures have
been rising, causing more dangers for
people, animals, plants and our
environment.

GREENHOUSE EFFECT
• The greenhouse effect is the process by which absorption and emission of infrared
radiation by gases in the atmosphere are purported to warm a planet's lower atmosphere
and surface.
• Naturally occurring greenhouse gases have a mean warming effect of about 33 °C (59 °F).
• The major greenhouse gases are:
 Water vapor (causes about 36-70 %of the greenhouse effect);
 Carbon dioxide (CO2) (causes 9-26 %);
 Methane (CH4) (causes 4-9 %);
 Ozone (O3) (causes 3-7 %).
 Clouds also affect the radiation balance, but they are composed of liquid water or ice
and so have different effects on radiation from water vapor.

CAUSES OF GLOBAL WARMING
• Electrical pollution is a main cause for Global Warming. Mostly, fossil fuels are burned to
create electricity and are made of dead plants and animals. Some examples of fossil fuels
are oil and petroleum. Many pollutants (chemicals that pollute the air, water, and land) are
sent into the air when fossil fuels are burned. Some of these chemicals are called
greenhouse gasses.
• Petroleum, one of the sources of energy, is used a lot. It is used for transportation, making
electricity, and making many other things. Although this source of energy gives off a lot of
pollution, it is used for 38% of the United States’ energy.
• When we throw our garbage away, the garbage goes to landfills. They are full of garbage.
The garbage is then sometimes burned. This sends an enormous amount of greenhouse
gasses into the air and makes global warming even worse.
• Another factor that makes global warming worse is when trees are cut down. Trees and
other plants collect and absorb carbon dioxide (CO2), which is a greenhouse gas.

EFFECTS OF GLOBAL WARMING
• Global warming is affecting many parts of the world, including melting glaciers,
creating the sea to rise even more, and when that happens, the water covers many low
land islands.
• Global Warming also destroys many huge forests. The pollution that causes global
warming is linked to acid rain. Acid rain gradually destroys almost everything it
touches. Global warming is also causing many more fires that wipe out whole forests.
This happens because global warming can make the earth very hot. In forests, some
plants and trees leaves can be so dry that can catch on fire.

PRECAUTIONS TO PREVENT GLOBAL
WARMING
• Useless usage of AC's and Refrigerators should be stopped because from them
harmful rays cfc's are emitted which results in depletion of ozone layer and from that
hole UV rays of Sun comes to the earth and cause many diseases to both animals and
plants i.e. Skin cancer etc. ,
• CNG and hydrogen operated vehicles should be used.
• More no. of trees should be planted.
• Chimneys in the Industries should be upgraded so that most of the effluents should
get filtered down there.

THANK YOU