I AM HAFIZ MUHAMMAD WASEEM from mailsi vehari BSc from science college Multan MSC university of education Lahore i love Pakistan and my teachers

1. HAFIZ
MUHAM
MAD
WASEEM
LAHOR
E
PAKIST
AN

2. UNIVESITY OF
EDUCATION LAHORE
PAKISTAN

3. ECOLOGICAL DEFINITION
A gradual increase in the overall
temperature of the earth's atmosphere
generally attributed to the greenhouse
effect caused by increased levels of
carbon dioxide, CFCs, and other
pollutants.

6. GLOBAL WARMING IN EASY
WORDS
Global warming is the temperature of
Earth's surface, oceans and
atmosphere going up over tens of
years

7. HISTORY
The term global warming was first used in its
current sense on 8 August 1975 in a paper
by Wallace Smith Broecker in the journal of
Science called "Climate Change: Are We on
the Brink of a Pronounced Global Warming?“
“Inadvertent climate”

8. Global warming became more
widely popular after 1988 when
NASA climate scientist James
Hansen used the term in the
Congress.

9. CAUSES OF GLOBAL
WARMING
1. Natural causes
2. Human causes

10. Natural causes include
Earth’s orbital changes
Volcanic eruptions
Drifting continents
Oceanic circulation
Impact events

11. Human causes include
Adding Green house gases, CFCs
(chloro-floro carbons)

14. THERMAL CHANGES/RISE
Climate change has happened many times
over the history of the Earth, including the
coming and going of ice ages. But modern
climate change is different because people
are putting carbon dioxide into the
atmosphere very quickly.

15. By about 1850, the temperature has
risen by about 1 °C (1.8 °F). Starting in
1979, satellites started measuring the
temperature of the Earth.

18. THE GREEN HOUSE EFFECT
Coal-burning power plants, car exhausts,
factory smokestacks, and other man-made waste
gas vents give off about 23 billion tons of carbon
dioxide and other greenhouse gases into the
Earth's atmosphere each year.


19. The amount of CO2 in the air is about 31%
more than it was around 1750. About three-
quarters of the CO2 that people have put in
the air during the past 20 years are due to
burning fossil fuel like coal or oil. The rest
mostly comes from changes in how land is
used, like cutting down trees.

23. THE SUN
The sun gets a little bit hotter and
colder every 11 years. This is
called the 11-year sunspot cycle.

24. DUST AND DIRT
Dust and dirt in the air may come from
natural sources such as volcano's,
erosion
Meteoric dust. Some of this dirt falls
out within a few hours. Some
is aerosol, so small that it could stay
in the air for years.

25. EFFECTS/ADVERSE
EFFECTS
Global warming means
 Antarctica and Greenland ice sheets are
melting and the oceans are expanding.
Low-lying areas such
as Bangladesh, Florida,the Netherlands,
other areas face massive flooding.

27. CITIES AFFECTED BY SEA
LEVEL RISE
 London
 New York City, Norfolk, Virginia, United States
 Crisfield, Maryland, Miami, Los Angeles , United States
 Charleston, South Carolina
 Saint Petersburg
 Sydney, Australia
 Jakarta
 Thatta and Badin
 Malé, Maldives
 Mumbai


28. RESPONSE TO GLOBAL
WARMING
Energy conservation
Climate change mitigation
Nanotechnology

31. REFERENCES
 "What Is Global Warming?". National Geographic.
2019-01-22. Retrieved 2019-10-11.
 Boadi, D.; Benchaar, C.; Chiquette, J.; Massé, D.
(2004). "Mitigation strategies to reduce enteric
methane emissions from dairy cows: Update
review". Can. J. Anim. Sci. 84 (3): 319–
335. doi:10.4141/a03-109.
 "Sea Level Rise - NYS Dept. of Environmental
Conservation". New York State Department of
Environmental Conservation.