The document discusses global warming, defined as a long-term increase in Earth's average temperature primarily caused by human activities like burning fossil fuels and deforestation, which lead to increased greenhouse gas emissions. It outlines the consequences of global warming, including extreme weather and ecological disruptions, and emphasizes that it is a global issue requiring coordinated international actions and stricter environmental norms to mitigate. Preventative measures include reducing fossil fuel use, promoting recycling, halting deforestation, and utilizing public transportation.

1. Global Warming
By: Ghufran Ataie
Aria University

2. Key Study
• What is Global Warming?
• Greenhouse Gases
• Causes of Global Warming?
• Consequences of Global Warming.
• How to Prevent.
• Any Questions?

3. What is Global Warming
• Global warming is a long-term rise in the average temperature of
the Earth's climate system
• Global warming' is an expression which refers to the effect of human
activities that produces the unnatural change on the climate.
• It is an increase in earth‘s temperature due to burning of fossil fuels
(coal, oil and gas) and large-scale deforestation, which results in
emission of large amounts of 'greenhouse gases' to the atmosphere

4. Greenhouse Gases
• Greenhouse Gases are existing in the first layer of earth atmosphere
called Troposphere
• It’s the Greenhouse Gases that keeps warm the earth.
• Earth temperature is -18 Celsius without Greenhouse Gases

5. Greenhouse Gases
• Greenhouse Gases is consisting of
• Water vapor (H2O),
• Carbon dioxide (CO2),
• Methane (CH4),
• Nitrous oxide (N2O),
• Ozone (O3),
• Chlorofluorocarbons (CFCs),
• Hydrofluorocarbons (incl. HCFCs and HFCs)

6. • According to NASA,
Seventeen of the 18
warmest years in the 136-
year record all have
occurred since 2001,
except for 1998. The year
2016 ranks as the
warmest on record

7. • Troposphere Activity and Earth Warming

8. Causes of Global Warming?
• Is the Sun to Blame?
• Since 1978, a series of satellite instruments have measured the
energy output of the sun directly. The satellite data show a very slight
drop in solar irradiance (which is a measure of the amount of energy
the sun gives off) over this time period.
• So the sun doesn't appear to be responsible for the warming trend
observed over the past several decades

9. Causes of Global Warming?
• Most climate scientists agree
the main cause of the current
global warming trend is human
expansion of the "greenhouse
effect“
• So Human activity such as
burning fossil fuels Oil and Coal
increase the carbon dioxide in
atmosphere

10. Causes of Global Warming?
• Deforestation by burning
forests naturally or
unnaturally
• A big issue causing
increase in the
temperature is garbage

11. Consequences of Global Warming
• Getting the earth warm it means, it’s the end of Human and other
living Organisms in earth
• Getting Earth warm can cause to
• Melt down the thousands of years Ice Age
• Heavy Hurricane and storm
• Intense Drought
• Everything will be change in earth.

13. How to Prevent
• The Global Warming is not related to a single community or country,
it’s a global issue
• In order to prevent our environment from the bad effect of global
warming, there should be proper and strict norms which are must
followed by countries direct by United Nation.
• World should follow the recycle process of every possible thing to
avoid the garbage incineration process.
• Another way is to strictly stop the deforestation process as well as
replanting more plants

14. How to Prevent
• As only trees are the best mediums of reducing the effect of
greenhouse gases
• Trees and soil of tress absorbs and stores carbon dioxide gas as their
food in the presence of sun light
• Another way to lessen the atmospheric temperature is the usages of
low-flow showerheads and washing clothes with warm or cold water
instead of hot water
• We should reduce our needs of personal vehicles and try to use
public transportations like auto-rickshaw, buses, trains, etc.

15. Any Questions?