ENVIRONMENTAL ASSESSMENT

Local, national and global concern about the environment has been increasing rapidly over recent decades, and as a result, there has been a booming demand for environmental assessments.

Skilled Environmental Assessors are in high demand. Unfortunately though, many graduates from environmental courses lack the ability to conduct a proper environmental assessment.

Our Environmental Assessment Course is designed to fill this gap. Click here for details!

Extract from Course Notes:

TYPES OF POLLUTION

Pollutants can be grouped according to the main ecosystem which they affect, although one pollutant often affects more than one ecosystem. The pollutant groupings are:

Pollutants Affecting Water

 - Sewerage and inadequate sanitation. The pathogens in the sewerage cause diseases such as typhoid, cholera and gastroenteritis. The nutrients cause eutrophication (animal death by deprivation of oxygen)

- Fertilisers come from agricultural usage. They cause eutrophication.

- Silt comes from agriculture and erosion of the soil. It can be toxic and interferes with the breeding of mammals and birds. It also causes the silting up of estuaries.

- Toxic metals are the products of industry. They offer threats to both health and life.

Pollutants Affecting Marine Life

- Sewerage and inadequate sanitation have the same effect as in fresh water.

- Fertilisers washed down by rivers into the sea causes eutrophication

- Oil spills smother marine plants and animals.

- Plastics cause the death of marine animals

- Pesticides from agriculture interfere with the breeding of birds and mammals.

Pollutants Affecting the Land

Solid waste is classified as:

- Hazardous - radioactive, pesticides and medical poisons. These wastes are health and life threatening.

- Non-hazardous - domestic, urban, mining, industrial and scrap metal. These wastes are unsightly and their disposal takes up much space.

Pollutants Affecting the Air

- Sulphur dioxide from burning coal. Causes acid rain and respiratory problems.

- Nitrogen oxides caused by vehicle emissions

- Volatile hydrocarbons caused by vehicle emissions. These combine with nitrogen oxides to form photo chemical smog which causes respiratory problems.

- Carbon monoxide caused by un-burnt fuel in vehicle emissions. It restrict oxygen intake causing drowsiness, headaches and ultimately death.

- Carbon dioxide caused by the burning of fuel. It is conducive to global warming.

- CFCs (Chlorofluro-carbons) result from the use of some aerosol sprays, refrigeration and air conditioning coolants and foam bowing industries. The CFCs destroy the ozone layer in the atmosphere.

- Methane, produced on rubbish dumps and feedlots. It is conducive to global warming.

- Noise caused by traffic and industry. It can be very stressful and affect hearing.

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