Global warming is caused by increased greenhouse gases like carbon dioxide and methane trapping heat in the atmosphere. It is exacerbated by human activities such as high-speed industrialization, pollution, deforestation, and burning fossil fuels. While global warming refers specifically to rising temperatures, climate change encompasses broader changes to weather patterns over long periods. To mitigate global warming, alternatives to fossil fuels like renewable energy and reducing waste and unsustainable transportation can help lower greenhouse gas emissions.

1. GLOBAL WARMING
BY
Dr. R.GOWRI
ASSOCIATE PROFESSOR
DEPARTMENT OF PHARMACEUTICS
GRT INSTITUTE OF PHARMACEUTICAL EDUCATION AND RESEARCH,
TIRUTTANI

2. NATIONAL SCIENCE DAY 2023
THEME : GLOBAL SCIENCE FOR
GLOBAL WELL BEING
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

3. WHAT IS GLOBAL WARMING?
Global warming is an gradual long term increase in temperature of the
earth owing to increased amount of green house gases
Examples for Green house gases are
oCarbondioxide
oMethane
oNitrous oxide
It is a perilous effect on our environment we face nowadays.
It is an alarming situation and a serious threat to survival of humanity
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

4. CAUSES OF GLOBAL WARMING
• High speed industrialization
• Pollution
• Increase in population
• Deforestation
• Burning fossil fuels
• Waste disposal
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

5. GLOBAL WARMING VS CLIMATIC CHANGE
• Global warming and climatic change are technically two different
terms.
Global warming is rise in
the temperature of earth
atmosphere
It occurs mainly due to the
emission of green house
gas
Climatic change is change over from
one climatic state to another over an
extended time period
(Ex:Temperature,wind patterns)
It occurs due to volcanic eruptions,
change in ocean, shrinking mountain
glacier
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

6. GREEN HOUSE EFFECT
• It is a process by which solar radiation is absorbed by the green house
gases like carbon dioxide, methane etc
• The temperature of earth’s atmosphere is increased thus causing global
warming
• Ex: In daily life we experience, the phenomenon of warming of car’s
interior when it is left out in the sun
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

7. CAUSES OF GLOBAL WARMING
• High Speed Industrialization
• Pollution
• Increase In Population
• Deforestation
• Burning Fossil Fuels
• Waste Disposal
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

8. IMPACT OF GLOBAL WARMING ON
ENVIRONMENT
• Warmer temperature
• Higher sea level (Sea level is rising because water over 4 °C
(39 °F) expands when it gets warmer)
• Extreme heat and cold
• Floods in low lying areas
• Unseasonal rainfall
• Wildfire
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

9. PREVENTION OF GLOBAL WARMING
(SAY NO TO PLASTIC)
• Plastic is the predominant cause
of global warming and takes may
years to recycle.
• They emit green house gases as
they decompose
• Plastic reduces ecosystem ability
to adapt to climatic change, pose
a threat to human and animal life
• Say NO TO PLASTIC
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

10. PREVENTION OF GLOBAL WARMING
Use Renewable energy
• Solar, wind, hydroelectric,
biomass and geothermal power
can provide energy without the
planet warming effects of fossil
fuels
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

11. PREVENTION OF GLOBAL WARMING
Reduce water waste
Water saving reduces carbon
pollution because it takes lot of
energy to pump, heat and treat
water
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

12. PREVENTION OF GLOBAL WARMING
Use less power
• Turn off the lights
• Unplug appliances
.
When not
in use
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

13. PREVENTION OF GLOBAL WARMING
Choose sustainable transportation
• Minimise the use of car, bike
• Use public transport instead of driving a vehicle in solo
.
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

14. PRESENT GLOBAL WARMING- REASON
• It is due to human worst activities like burning things like gasoline for
cars and natural gas to keep house warm unfortunately the heat from
burning itself makes the world warmer.
• When human do deforestation, only less carbon-di-oxide is taken out
of the atmosphere by those plants
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

15. REFERENCE
• Foote, Eunice (November 1856) Circumstances affrecting the Heat of
the Sun’s Rays. The American Journal of Science and Arts. Vol. 22.
pp. 382–383.
• Menne, Matthew J.; Claude N. Williams, Jr.; Michael A. Palecki
(2010). “On the reliability of the US surface temperature”, Journal of
Geophysical Research. 115 (D11): D11108.
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Dr. R. GOWRI, GRTIPER, TIRUTTANI

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Dr. R. GOWRI, GRTIPER, TIRUTTANI