Pollution English Work.pptx

8/12/2019 Pollution English Work.pptx

1/16

Made by:

Bruno Cunha

Daniel Moreira

Jos Santos

Marcos BarbosaPedro Bessa


2/16

Pollution is the introduction of contaminants

by the men into the natural environment that

cause adverse change.

Pollution can take the form of chemical

substances or energy, such as noise, heat or

light. Pollutants, the components of pollution,

can be either foreign substances/energies ornaturally occurring contaminants.


3/16


4/16

There are six types of pollution:

Air Pollution

Water Pollution

Land Pollution

Noise Pollution

Radioactive Pollution

Thermal Pollution


5/16

Air pollution is indication of disturbances tothe composition of compounds in theatmosphere, as it may be summarized asshown:

Excess emission of gases/vapors intoatmosphere

saturation of chemicalcompounds/particulates

rate of dissipation (smaller than) rate ofabsorption through various cycles (i.e. carbonand nitrogen cycle)

Emergence of new chemical reactions of-


6/16

Global warming, acid rain, smog and

ozone depletion.


7/16

Water pollution is contamination of water

by foreign matter that deteriorates the

quality of the water. Water pollution covers

pollutions in liquid forms like oceanpollution and river pollution.


8/16

We can classify major sources that lead to water pollution tothe following categories:

petroleum products

synthetic agricultural chemicals

heavy metals hazardous wastes

excess organic matter

sediment

infectious organisms

air pollution

thermal pollution

soil pollution


9/16

Revered to as soil pollution, land pollution involves the

following mechanism:

Deposition of solid waste

Accumulation of non-biodegradable materials Chemicals become poisons

Alteration of soil chemical composition (imbalance of

chemical equilibrium to soil medium)


10/16

We can classify major sources that lead to noise pollution

to the following categories:

road traffic noise

air traffic

rail traffic

neighbourhood and domestic noise

incompatible land use

industrial noises


11/16


12/16

We can classify major sources that lead to

radioactive pollution to the following categories:

nuclear power plants

nuclear weapon

transportation

disposal of nuclear wasteuranium mining


13/16

There are commonly three types of radiation, namely:

Alpha particles, can be blocked by a piece of paper and

human skin.

Beta particles can penetrate through skin, while can beblocked by some pieces of glass and metal.

Gamma rays can penetrate easily to human skin and

damage cells on its way through, reaching far, and can

only be blocked by a very thick, strong, massive piece

of concrete.


14/16

This has become an increasing and the

most current pollution, owing to the

increasing call of globalization everywhere.

Heat produced from industries is a majorcontribution to the pollution, much to the

operation of the heavy industries which

produces high amount of heat energy.


15/16

We can classify major sources that lead to

thermal pollution to the following categories:

power plants creating electricity from fossil fuel

water as a cooling agent in industrial facilities

deforestation of the shoreline

soil erosion


16/16

Documents

Pollution English Work.pptx