2. • The world's population broke the 7
billion person barrier in 2011 and
is projected to increase by 40 % in
the coming 40 years.
• Population growth averages vary
among the world's nations.

3. Egyptian data shows that in 1948, Egypt's population
reached nearly twenty million,
added another twenty million by 1975,
twenty million more by 1994, reaching sixty million.
Another twenty million over the next seventeen years means
eighty million Egyptians by 2011.

5. Satellite photo
shows population
density
concentrated
around the Nile
river

6. Resources,
Air pollution,
Water pollution,
Noise pollution and
House hold waste & sewage.

7. The growth in the human population is increasing the
use of finite resources. These resources include:
fossil fuels such as coal, oil and natural gas are being
used up rapidly
raw materials such as metal ores and other minerals
are being used up rapidly.

8. The most common source of air pollution is the
combustion of fossil fuels. This usually happens in
vehicle engines and power stations.
This results in increase of Carbon dioxide, Sulfur
dioxide and other green house gases.

9. Water pollution is caused by the discharge of harmful
substances into rivers, lakes and seas.
Many aquatic invertebrate animals cannot survive in
polluted water.
so their presence or absence indicates the extent to
which a body of water is polluted.

11. Most rubbish is buried in landfill sites and not all of it
comprises safe materials. Even common household
items can contain toxic chemicals such as poisonous
metals. Many smoke alarms contain radioactive
americium, for example.
Raw sewage is harmful to the environment. It kills
aquatic organisms and harms human health.