Global warming is caused by both natural phenomena and human activities that increase greenhouse gases. The effects of global warming are already occurring and include rising sea levels, more extreme weather, and shifting animal and plant ranges. If warming continues, even more severe consequences are predicted, such as significantly rising seas that could flood many coastal areas, more frequent severe weather like hurricanes, and loss of animal and plant species unable to adapt. Global warming may also impact agriculture, cause economic damages, and allow diseases to spread into new regions.

1. GLOBAL WARMING,
ACID RAIN AND
DROUGHT
DONE BY: NATASHA NKUTU, TESA RIYADAH AND GRACE LUMONYA Y10N

2. WHAT IS GLOBAL WARMING?
Global warming is the rise in the average temperature of Earth's
atmosphere and oceans since the late 19th century and its projected
continuation. Since the early 20th century, Earth's mean surface
temperature has increased by about 0.8 °C (1.4 °F), with about two-
thirds of the increase occurring since 1980.Warming of the climate
system is not misinterpreted, and scientists are more than 90% certain
that it is primarily caused by increasing concentrations of greenhouse
gases produced by human activities such as the burning of fossil fuels
and deforestation. These findings are recognized by the national science
academies of all major industrialized nations

3. WHAT ARE THE CAUSES OF GLOBAL WARMNG?
• Global Warming is caused by many things. The causes are split up into two
groups, man-made or anthropogenic causes, and natural causes.
• Natural Causes:
Natural causes are causes created by nature. One natural cause is a release
of methane gas from arctic tundra (the arctic) plain and wetlands. Methane
is a greenhouse gas. A greenhouse gas is a gas that traps heat in the earth's
atmosphere. Another natural cause is that the earth goes through a cycle of
climate change. This climate change usually lasts about 40,000 years.

4. • Man-made Causes
Man-made causes probably do the most damage. There are many man-
made causes.
Pollution is one of the biggest man-made problem. Burning fossil fuels
is one thing that causes pollution. Fossil fuels are fuels made of organic
matter such as coal, or oil. When fossil fuels are burned they give off a
green house gas called CO2. Also mining coal and oil allows methane to
escape. Methane is naturally in the ground. When coal or oil is mined
you have to dig up the earth a little. When you dig up the fossil fuels
you dig up the methane as well.

5. • Another major man-made cause of Global Warming is population.
More people means more food, and more methods of
transportation. That means more methane because there will be
more burning of fossil fuels, and more agriculture. If your in a barn
filled with animals, something smells terrible, and that smell is
methane. Another source of methane is manure. Because more
food is needed we have to raise food. Animals like cows are a
source of food which means more manure and methane. Another
problem with the increasing population is transportation. More
people means more cars, and more cars means more pollution.
Also, many people have more than one car.

6. • Since CO2 contributes to global warming, the increase in
population makes the problem worse because we breathe out
CO2. Also, the trees that convert our CO2 to oxygen are being
demolished because we're using the land that we cut the trees
down from as property for our homes and buildings. We are not
replacing the trees (an important part of our eco system), so we
are constantly taking advantage of our natural resources and giving
nothing back in return.

7. EFFECTS OF GLOBAL WARMING
• The planet is warming, from North Pole to South Pole, and
everywhere in between. Globally, the mercury is already up more
than 1 degree Fahrenheit (0.8 degree Celsius), and even more in
sensitive polar regions. And the effects of rising temperatures
aren’t waiting for some far-flung future. They’re happening right
now. Signs are appearing all over, and some of them are surprising.
The heat is not only melting glaciers and sea ice, it’s also shifting
precipitation patterns and setting animals on the move

8. Some impacts from increasing temperatures are already
happening:
Ice is melting worldwide, especially at the Earth’s poles. This
includes mountain glaciers, ice sheets covering West Antarctica
and Greenland, and Arctic sea ice
 Sea level rise became faster over the last century.
 Some butterflies, foxes, and alpine plants have moved farther
north or to higher, cooler areas.
 Precipitation (rain and snowfall) has increased across the globe,
on average.

9. Other effects could happen later this century, if warming continues:
Sea levels are expected to rise between 7 and 23 inches (18 and 59
centimeters) by the end of the century, and continued melting at
the poles could add between 4 and 8 inches (10 to 20 centimeters).
• Hurricanes and other storms are likely to become stronger.
• Species that depend on one another may become out of sync.
For example, plants could bloom earlier than their pollinating
insects become active.
• Floods and droughts will become more common. Rainfall in
Ethiopia, where droughts are already common, could decline by
10 percent over the next 50 years.
• Less fresh water will be available. If the Quelccaya ice cap in
Peru continues to melt at its current rate, it will be gone by 2100,
leaving thousands of people who rely on it for drinking water and
electricity without a source of either.
•

10. PREDICTED EFFECTS OF GLOBAL WARMING
• Rising Sea Level
The most obvious effect of global warming is the warming of the planet. Rising
temperatures are already responsible for the melting of glaciers and ice, and if present day
trends continue the effect could be devastating as massive areas of ice begin to melt and
flow into the oceans. With rising sea levels comes the danger that many areas considered
waterfront property today could be completely under water in just a few decades.
Extreme Weather
Global warming is predicted to heat up the world's oceans, which means more intense
hurricanes and typhoons. In addition, warmer climates around the earth are expected to
change traditional weather patterns, meaning more thunderstorms and tornadoes in some
areas and devastating drought in others.

11. Some diseases will spread, such as malaria carried by mosquitoes.
Ecosystems will change—some species will move farther north or become more
successful; others won’t be able to move and could become extinct.
• Agricultural Changes
Both the increase in temperature and changes in weather patterns are expected to
significantly affect the agricultural industry. Droughts will have the obvious effect of making
soil infertile, but in some areas, increased rain may have the opposite effect. What is a
desert today could conceivably become a verdant valley in a century or two.
• Loss of Species
Because global warming is essentially speeding up what would be a natural process,
extreme climatic changes impact the habitat of animals at a pace that's too rapid for them
to naturally evolve to meet successfully. The result is expected to be a wholesale loss of
certain animal species, which may mean even more devastation to an ecosystem ill-
prepared to handle such rapid change.

12. • Economic Effects
The change in agriculture will necessitate unforeseen fluctuations in the price
of food. The rise in temperatures will place economic pressures for cooling
costs, especially those who cool with electricity. The devastating storms that
may become commonplace will result in a plethora of rising costs, from flood
insurance to health care.
Disease
Scientists are already reporting that higher temperatures in Third World
environments have resulted in a resurgence of infectious diseases associated
with bacteria that thrive in warm temperatures. As global warming takes hold,
these diseases are expected to widen their scope and spread quickly into
developed countries.