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Global warming
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Global Warming
THARUMARAJA SAJARUPAN
Student ,
Department of Engineering Technology,
Faculty of Technology,
University of Ruhuna.
ENVIRONMENTAL SCIENCE
2. What is Global
Warming?
an average increase in the temperature of
the atmosphere near the Earth’s surface and
in the troposphere (1st layer), which can
contribute to changes in global climate.
patterns.
2
12. Melting of
glaciers
An assessment of about
200,000 glaciers in the world,
some of which have been
monitored since the mid 19th
century, has found that about
two thirds of the current rate
of glacial melting is due to
human influences on the
climate.
12
16. Air Quality
An increase in the concentration of
ground-level ozone
↓
Damage lung tissue
↓
Harmful for those with asthma and
other chronic lung diseases
16
17. Food supply
Rising temperatures and variable
precipitation
↓
Decrease the production of staple
foods in many of the poorest
regions
↓
Increasing risks of malnutrition
17
18. Population
displacement
Rising sea levels
↓
Increase the risk of coastal flooding
↓
(Necessitate population
displacement)
More than half of the world's population now lives
within 60km of the sea.
Most vulnerable regions: Nile delta in Egypt, the
Ganges-
Brahmaputra delta in Bangladesh, many small islands,
such as the Maldives, the Marshall Islands and Tuvalu.
18
19. UV Exposure (Australia)
Skin Cancer :
an abnormal growth of
skin tissues
Premature aging :
make the skin thick,
wrinkled, and leathery
Cataracts :
No longer have transparent
lenses in their eyes.
19
Other Eye Damages
– Skin cancer around the eyes
– Degeneration of the yellow spot
Suppression of Immunity
– Overexposure to UV radiation → suppress proper
functioning of the body's immune system and natural
defenses of skin
– UV-B radiation weakens the immune system →
increases the chance of infection and disease
21. Contribution of Goverment to stop
Global Warming. 21
set some laws to limit the amount of
pollutants produced by factories.
develop the skills of using renewable fuels,
e.g. Solar energy,wind energy
encourage the factories to replace fossil
fuels by renewable fuels, which would not
cause environmental pollution.
carry out energy saving scheme → reduce
the pollution produced by burning fossil
fuels.
build more plants → reduce the pollutants
■ e.g.CO2
22. Contribution of Citizen to stop
Global Warming. 22
reduce the use of plastic bags → as burning
plastic emit CH4.
recycle the resources, e.g. Plastic
reduce the use of sprays → as CFCs would
be emitted out.
reduce the use of air-conditioner, which will
emit CFCs.
use public transportation instead of private
cars → reduce the pollutants emitted by
cars
Plant Trees.
Save Electricity.
23. Contribution of Citizen to stop
Global Warming. 23
Spread awareness.
Turn off your computer or the TV when
you’re not using it.
Turn off the lights when you leave a room.
Be Bulb Smart—Use CFLs
Dress lightly when it’s hot instead of
turning up the air conditioning.
Use Fuel efficient cars.
Drive less, drive SMART Use a bicycle