This document provides an overview of a session on global warming, including its definition as the observed increase in average temperatures of the Earth's atmosphere and oceans, primary causes as carbon dioxide emissions from human activities, and effects such as rising sea levels and increased extreme weather events. Prevention methods are also discussed like using renewable energy and public transportation to reduce carbon dioxide emissions.

1. WELCOME
A
SESSION
ON
GLOBAL
WARMING

2. CONTENTS
Definition
Causes
Effects
Prevention
Thanks

3. DEFINITION
Global warming
is the observed
and projected
increases in
the average
temperature of
Earth's
atmosphere
and oceans.

4. CAUSES
Carbon dioxide(CO2)
emissions.
Catastrophic
changes in the
environment take
place when the
concentration of
CO2 reaches the
level of about 450
ppm.

5. EFFECTS
Increase of temperature
on the earth by about
3°c to 5°c by the year
2100.
Rise of sea levels by 25
meters (82 feet) by the
year 2100.
Melting of Glaciers and
Polar ice.
Increase of weather
events and natural
disasters like Droughts,
Floods, Tornadoes, etc.

6. PREVENTION
Use
to reduce
CO2 .
Every one should
Make
to save water.
Use to
replace electricity and
fuel.
&
protect our

7. THANKS
Thank
You.
Bishweashwar Shukla.
Vanasthali Public School,
Class-VI(B), Roll No-7,
Nilgiri House,
Mayur Vihar-III, Delhi-96.