Презентация на тему Загрязнение воды.

Water pollution

• Water is everywhere. It’s an integral part of all living beings but there is no ocean or sea in the whole world which wouldn’t be used as a dump. Water pollution not only damages large populations of birds, fish and animals but also affects people in different ways.

Petroleum products

• There are different types of water pollution. One of the worst ones is petroleum products such as oil, fuel and plastic which are accidentally spilled from ships and tankers as a result of the leak. They are very dangerous for our sea world and often cause massive death.

Toxic chemicals

• Another type of pollutants is poisonous chemicals. When they get into rivers and lakes they may infect fish and animals and when harvested they become a serious threat to people’s health.

Throwing heavy metals

• Pollutants represented by heavy metals such as uranium, radium, selenium and some others result from industry, car fumes and mines. When their concentration in the organism reaches quite a high level they may cause long-term health problems.

Wastewater

• One more class of harmful pollutants is pathogens which penetrate into water by means of sewage, storm drains and runoff from farms.

Thermal disturbance

• Finally, thermal pollution is a great concern. Very often water used in factories and power plants is poured back into lakes and seas being much warmer which is not optimal for many species of fish, so they go away from those places. As a result, the whole balance is broken.

If people want to save our planet’s water resources, urgent measures must be taken to protect it.