A presentation on Global Warming by Nilshan, Danyal, Jesse and Ahmed of Grade 8 B6 of The Westminster School, Dubai.

1. Global Warming
By : Nilshan,Danyal ,Jesse and
Ahmed
8-B6

2. What is Global Warming?
Global warming is the rise in the average temperature of Earth's
atmosphere 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.

3. What do you mean by Green
House Gas?
A greenhouse gas is a gas in an atmosphere
that absorbs and emits radiation within the thermal infrared range. This
process is the fundamental cause of the greenhouse effect.

5. What do you mean
Deforestation?
Deforestation, clearance is the removal of a forest or stand of trees
where the land is thereafter converted to a nonforest use. Examples of
deforestation include conversion of forestland to farms, ranches, or
urban use.

6. What do you mean by Fossil
Fuels?
Fossil fuels are fuels formed by natural processes of buried
dead organisms. The age of the organisms and their resulting fossil
fuels is typically millions of years, and sometimes exceeds 650 million
years. Fossil fuels contain high percentages of carbon and
include coal, petroleum, and natural gas.

7. Questions[Answer in a short
form].
•What do you mean Green House Gases?
.What do you mean by Global Warming?
.What do you mean by Fossil Fuels?

8. Answers
1. A greenhouse gas is a gas in an atmosphere
that absorbs and emits radiation within
the thermal infrared range.
2. Global warming is the rise in the average
temperature of Earth's atmosphere.
3. Fossil fuels are fuels formed by natural
processes of buried dead organisms.