3. WATER
Global demand for
water increases,
as many countries are
facing large population
growth.
The water crisis is not
only a problem of dry
countries.
The demand for water
will increase in this
century.
One of the ways out is
desalination.
4. Desalination
It is the process
by which salt
water is
converted into
drinkable fresh
water.The first
desalination
plant was set up
in the UAE in
1960,producing
56,250 liters of
fresh water a day.
5. Tons of gases
coming of cars
and the smoke
rising from
factories and
plants pollute
the air.This
results in acid
rains.
6. Acid rains are killing forests in Europe nearly every
species of tree is damaged by pollution:their leaves are
thinning,their grouth is stopped.
Result of acid rains
9. Problems with energy
Energy resources are the greatest problem of this
century because on the one hand petrol and gas are
damaging to the environment and ,on the other hand,
oil and gas reserves are not so great to keep people
supplied for long.they predict the use of
Energy from the sun;
Energy from the wind;
Energy from water;
Energy from the earth;
Energy from litter.
10. Problem with
resources
Energy and resources
are ecological
problems.Europeans
and North Americans
are all big energy users
and most of them are
big energy wasters
too.For Armenia energy
is one of the greatest
problems and it is
especially important to
conserve energy.
11.
12. Role of
sevan lake
Lake Sevan is the
largest lake in
Armenia. It is located at
the altitude of 1900
meters above sea
level.Lake Sevan is the
only large water body of
Armenia and has an
important role.
13. .
The chief problem of Lake
Sevan, the largest body of
fresh water in Armenia,
was the sharp reduction of
the water level, which
began to lower in 1950
because of the excessive
water drainage for energy
needs and irrigation
purposes. As a result of
this brutal use of water,
the level of the lake has
fallen
