global warming and its effects.

1. GLOBAL WARMING AND ITS
EFFECTS.

2. WHAT IS GLOBAL WARMING?
• '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.

3. MAIN CAUSES OF GLOBAL
WARMING.
• GREENHOUSE EFFECT.
• GREENHOUSE GASES.

4. WHAT IS GREENHOUSE
EFFECT?
The word greenhouse effect holds two meanings :-
• First is the Natural Greenhouse Effect is that one
which keeps our Earth’s climate normal and
comfortable.
• On the other hand there is a Man-Made
Greenhouse Effect which is an enhancement of
natural greenhouse made from burning of fossil
fuels, petroleum, coal, and natural gas.

5. NATURAL GREENHOUSE
EFFECT.
• Natural greenhouse effect is made from the heat energy
radiated from the sun.
• Greenhouse gases are naturally form the presence in the
atmosphere.
• Sunlight goes through the atmosphere warming earth in
a cycle.
• The cycle continues through the atmosphere as the
gases absorb energy at the same time while the leftovers
go to space.
• Some sun energy trapped in earth makes it much
warmer and comfortable

7. MAN-MADE GREENHOUSE
EFFECT.
• Activities made by humans result in production of
greenhouse gases.
• While the amounts of gases increase in the
atmosphere the stability of the greenhouse gases
change causing effects on the whole world.
• Greenhouse effects caused by burning of fossil fuels
like coal, oil, natural gases, cutting and burning of
trees producing carbon dioxide.
• Greenhouse gases trap heat making earth warmer
and creating global warming.

8. 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.

10. EFFECTS OF GLOBAL WARMING.
• ON FARMING.
• ON SEA LEVEL.
• ON WEATHER.
• ON WATER.
• ON PEOPLE AND ANIMALS.

11. • ON FARMING:- Changes in the weather affect the
growing crops around the world. Crops of wheat and
rice grow well in high temperatures, sugarcane and
maize don’t survive in high temperature and end up
dying.
Furthermore change in the amount of rainfall affect the
growth leading to shortage of food. South-Eastern part
of the world will be affected as people will suffer
without food.
• ON SEA LEVEL:- Rising temperatures cause water of the
oceans along with the sea to increase as Increasing
temperatures melt ice and it starts to flow into the seas
of Antarctic and Greenland.
Sea levels rise by 20-40 cm causing floods in areas with
low coast areas e.g. Bangladesh and Netherland. Flood
in many areas cause a danger for living things.

13. • ON WEATHER:- Increasing in Greenhouse gases will
change weather around the world. North-western
countries have an increase of temperature .
Summers and winters are much hotter. Some places will
become hotter and wetter while some will be dry and
cooler. The world will change with droughts, storms
and floods.
• ON WATER:- Countries all over the world will be
affected. Britain and Southeast will have a risk of
droughts and Africa won’t have enough water.
• ON PEOPLE AND ANIMALS:-Changes make it hard for
humans to adjust and adapt to climate. Moving from
one place to another will be hard. While weather and
temperature changes, the homes of animals will be
affected. Moving of ocean animals like seals will be
hard. New homes for animals may not be safe causing
loss in animal population.

15. PREVENTIONS.
• Stop buying Wasteful products if you don't need because it is
going to end up in the garbage.
• Turn off the lights and other electrical appliances when you leave
the room.
• Only turn on water when you need it.
• Reduce, reuse and recycle:-
Reduce the things that you do not need.
Reuse items that you have until they are no longer any good.
Recycle all that is possible.
• Choose natural gas over coal and oil every chance you get.
• Get a hybrid or an electric car when shopping for that new car to
prevent from pollution.
• Walk to nearby places or get there by bike.
• Get involved in tree planting projects.

16. THANK YOU