WHAT IS WATER? Water is a precious element which covers about the 3/4 of the earth’s surface. Without water there wouldn’t be any form of life on the earth.
WATER ORIGIN The water on the earth probably originated after the very numerous and intense volcanic eruptions which took place on the earth’s surface for about 3 milliard years.
WATER COMPOSITION
Water is a compound of hydrogen and oxigen and it has chemical formula H2O
WATER’S CLASSIFICATION There are several kinds of waters on the earth: Superficial
Drinkable
Mineral Thermal
WATER CYCLE It consists of a continous movement of water from atmosphere to soil and from ground to atmosphere.
THE SPRINGS They are natural flous of water which gush out from the ground in a single point and are fed by a vein flowing in non visible underground ways.
THE RIVERS They are watercourses with perennial flow fed by springs, atmospheric precipitations and by the waters from meltin of snow and glaciers.
THE GLACIERS THE GLACIER IS USUALLY COMPARED TO A RIVER FLOWING BY GRAVITY FORCE FROM THE HIGHEST MOUNTAIN DOWNWARDS AD PROVIDING WATER TO VALLEYS AND FEEDING RIVERS.
WATER CONSUMPTION Beginning from the 60s the water consumption remarkably increased, so much to become a real problem for the future generations.
WATER POLLUTION With the extraordinary increase of the industrial production and of the consuptions, it was determinated a deep alteration of the surround environment. Among the most evident injuries caused by man to habitat, there is the water pollution.
KINDS OF WATER POLLUTION THERE ARE SEVERAL KINDS OF WATER POLLUTION: • Natural • Domestic • Agricultural • Industrial
PETROLEUM PARASITICIDES
INDUSTRIAL AND HOUSEHOLD WASTE
PESTICIDES FERTILIZERS
WASTE
NATURAL WATER POLLUTION DEATH OF FISH AND SEA-BIRDS
WATER BEDS POLLUTION
LOSSES IN TOURISM AND ECONOMY
HEALTH DAMAGES
EUTROPHICATION OF LAKES AND SEAS
NATURAL WATER POLLUTION
During floods, river waters carry several materials, among which there is also organic material that undergoes processes of putrefaction and fermentation.
HOUSEHOLD WATER POLLUTION
Population increase and a greater welfare bring about increasing in: • consumptions and sewer-discharge, • foams due to non biodegradable detergents, • plastic materials consumptions. consumptions
AGRICULTURAL WATER POLLUTION
It is caused by the products used for lands and plants, whose refuses are carried by backwaters and dived into rivers and canals.
INDUSTRIAL WATER POLLUTION
Most of the factories produce organic waste which give rise to fungi and bacteria. One million tons of waste are discharged into our seas. 70% come from industrial waste.
PERSONAL REMARKS • HOW CAN I PROTECT WATER? • I SHOULDN’T LEAVE USELESSLY THE TAP RUNNING; • I SHOULDN’T WASTE WATER IN GAMES OR TRICKS; • I SHOULDN’T THROW RUBBISH, PAPER, PLASTIC BAGS IN THE WATER IN ORDER TO AVOID TO POLLUTE IT, BECAUSE POLLUTED WATER CANNOT BE USED; • I SHOULD INFORM THE OTHERS AND GET INFORMATION ABOUT ALL THE POSSIBLE WAYS TO PROTECT WATER.