POLLUTION.

Acid Rain. Greenhouse Effect. Global Warming. Water Pollution.

What is Acid Rain?.What is Acid Rain?.

It is caused by oxidize of nitrogen and dioxide of sulphur.

Factories, electric power stations and petroleum are the responsable of the acid rain.

These contaminated gases are part of the water of the clouds.

When it rains pollution can go to rivers, the forests, lakes, seas, etc.

When it happens, as like the picture, the contaminated rains can destroy the forests.

Solutions.

Reduce the level of sulphur in fuels.

Controling the emissions of gases in factories.

Reduce the use of carbon y electric power stations to produce electricity.

Use hybrid or electric cars.

Use the public transport like buses, subway or tram.

What is Greenhouse Effect?.

It is caused by dioxide of carbono and methane in the atmosphere.

These two gases cause that part of the radiation of the sun is not go back again to the atmosphere.

From the beginning of the Industrial Age the level of emissions has been increased a lot

Only in the last years the population and the countries have been conscious of the seriousness of the problem.

Kyoto's Protocol

It is a global agreement about to reduce the levels of gases are caused of the global warming.

It was signed in 1997 in the japanese city of Kyoto.

Countries were agree to reduce gas emissions.

The big problem is that USA refuse to apply the protocol and other countries as China and India are not included and today the emissions of these two countries is increasing a lot.

What is Global Warming?What is Global Warming?

From the XVIII century our civilization began to use massively fossil fuels as carbon and petroleum

In last 150 years the global temperature in the planet have been increased about one grade.

By the year 2050 as climate of the planet is warming the temperature can rise about two grades.

Some of the effects of the global warming could be: Climate changes. Thaw of the poles. Dissapearance of the

glaciers. Floods. Expansion of some

diseases, parasites as mosquito, etc.

The future is tomorrow, Global warming is now.

Water PollutionWater Pollution

It is caused by the humans, the factories, the agriculture, the ranching, etc.

The contamination of the rivers, lakes and aquiferous.

The contamination in seas and oceans.

What are the waste waters?

It is caused by the human activity.

Waste waters included the waters from the bathrooms, the kitchens,washing machines, the dumps, etc.

Waste waters are responsible of the contamination of the rivers, seas and oceans.

The waste waters must be treated in specialized water plants before to return this water to the rivers or the sea.

In Spain cities with more than 10.000 people must to treated the waste water.

Hole of the cap of ozone.

It is caused by the CFC (molecule of chlorine).

The chlorine cause a destruction of the molecule of ozone in the atmosphere.

The ozone is basic for the living in the earth: the cap of ozone filter the sun radiation.

The hole was discovered in the 80's in the Artic zone.The cap of ozone in this zone had been reduced about 50%.

From the beginning of the 90's we don't use CFC but we use another gases that contribuite to global warming.