St CHRISTOPHER ‘’S COLLEGE OF
EDUCATION
• TOPIC: SOCIAL ISSUES AND ENVIRONMENT
• NAME: R.S SRI PREETHEE

CLIMATE CHANGE
• Climate change in the world can be caused by various activities.
When climate change occurs; temperatures can increase a
dramatically. When temperature rises, many different changes can
occur on Earth. For example, it can result in more floods, droughts,
or intense rain, as well as more frequent and severe heat waves.
Oceans and glaciers have also experienced some changes: oceans
are warming and becoming more acidic, glaciers are melting, and
sea levels are rising. As these changes frequently occur in future
decades, they will likely present challenges to our society and
environment

• During the past century, human activities have released large amounts of carbon
dioxide and other greenhouse gases into the atmosphere. Most of the gases
come from burning fossil fuels to produce energy. Greenhouse gases are like a
blanket around the Earth, trapping energy in the atmosphere and causing it to
warm. This is called the greenhouse effect and it is natural and necessary to
support life on earth. However, while greenhouse gases buildup, the climate
changes and result in dangerous effects to human health and ecosystems. People
have adapted to the stable climate we have enjoyed since the last ice age which
ended several thousand years ago. A warmer climate can bring changes that can
affect our water supplies, agriculture, power and transportation systems, the
natural environment, and even our own health and safety. There are some climate
changes that are unavoidable and nothing can be done about it. For example,
carbon dioxide can stay in the atmosphere for nearly a century, so Earth will
continue to warm in the future.

• Global warming has really taken effect in the world over the last century. It
is the unusually rapid increase in the Earth’s average surface temperature
over the past century primarily due to the greenhouse gases released as
people burn fossil fuels. Global warming is due to the enhancing
greenhouse gases emission and build-up in the Earth’s environment. The
gases that have an influence on the atmosphere are water vapor, carbon
dioxide, dinitrogen-oxide, and methane. Almost 30 percent of incoming
sunlight is reflected back into space by bright surfaces like clouds and ice.
In the other 70 percent, most is absorbed by the land and ocean, and the
rest is absorbed by the atmosphere.

• In conclusion, we need to take part and try to stop global warming
and other effects on climate change. If the earth’s temperatures
continue to rise in the future, living things on earth would become
extinct due to the high temperatures. If humans contribute to
control global warming, this world would be cooler and the high
temperatures we currently have would decrease. If everybody as
one take stand and try to end most of the climate changes that are
occurring, this world would be a safer place to live on.

GLOBAL WARING
• Global warming is the ongoing rise of the average temperature of
the Earth's climate system and has been demonstratedby
direct temperature measurements and by measurementsof various
effects of the warming.[1] It is a major aspect of climate change which, in
addition to rising global surface temperWhile there have been prehistoric
periods of global warming,[4] observed changes since the mid-20th
century have been unprecedented in rate and scale.[5]atures,[

• The Intergovernmental Panel on Climate Change (IPCC) concluded that "human
influence on climate has been the dominant cause of observed warming since
the mid-20th century".[9] These findings have been recognized by the national
science academies of major nations and are not disputed by any scientific body
of national or international standing.[10] The largest human influence has been
the emission of greenhouse gases, with over 90% of the impact from carbon
dioxide and methane.[11] Fossil fuel burning is the principal source of these
gases, with agricultural emissions and deforestation also playing significant
roles.

OZONE LAYER
• The ozone layer or ozone shield is a region of Earth's stratospherethat
absorbs most of the Sun's ultraviolet radiation. It contains high
concentration of ozone (O3) in relation to other parts of the atmosphere,
although still small in relation to other gases in the stratosphere. The
ozone layer contains less than 10 parts per million of ozone, while the
average ozone concentration in Earth's atmosphere as a whole is about
0.3 parts per million

ACID RAIN
• Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning
that it has elevated levels of hydrogen ions (low pH). It can have harmful effects on
plants, aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur
dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to
produce acids. Some governments have made efforts since the 1970s[1] to reduce the
release of sulfur dioxide and nitrogen oxide into the atmosphere with positive results.
Nitrogen oxides can also be produced naturally by lightning strikes, and sulfur dioxide is
produced by volcanic eruptions.[2] Acid rain has been shown to have adverse impacts on
forests, freshwaters and soils, killing insect and aquatic life-forms, causing paint to
peel, corrosion of steel structures such as bridges, and weathering of stone buildings
and statues as well as having impacts on human health.[3

• Unpolluted rain can also contain other chemicals which affect its pH
(acidity level). A commonexample is nitric acid produced by electric
discharge in the atmosphere such as lightning.[4] Acid deposition as
an environmental issue (discussed later in the article) would include
additional acids other than H2CO3.

CONCLUSION

KNOWLEDGEMENT
• I thank to my ma’am Mrs. George Jeena because she were gave me
this opportunity to do and she help to do this work thank you ma’am

•
• THANK YOU