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Pollution in Ecology

Created by Yin Yin

Human Impact on Ecosystems

Human impact on Ecosystem

Humans on earth= 100 and 50 thousand years

Age of planet= 4 and a half billion years!!!

Even though we lived on earth for a short period of time, we have made a huge effect on the earth's resources and organisms in many way.

Humans effect ecosystem in three ways:

1. Pollutions

2. Conservation

3. Waste Management

Today we are going to learn all about the pollution!

The earth

Humans

Human beings

What is Pollution?

Pollution is any harmful addition to the environment

Pollution

Where does the pollution come from?

Where does pollution come from ?

  • Human pollution eg. littering, sewage disposal, electricity generation, transport such as cars, noisy acitivaties, radioactive processes
  • Natural pollutants eg. volcanic emissions, smoke from natural forest fire
  • All of these pollution affect air, water, sea and soil or land
  • Pollutants are substances that cause pollution

Types of pollutants:

What are the types of pollution ?

Domestic Pollution: Including household wastes

Adricultural Pollution: Including use of sprays to contols weeds, the overuse of fertilisers and disposal of farmyard wastes such as slurry

Industrial Pollution: Incuding smoke that causes acid rain and wastes that may damage streams, rivers and lakes

An example of air pollution

  • An example of air pollution is ozone depletion
  • Ozone= O3= a gas that forms a protective layer in the upper atmosphere
  • The ozone is between 10 and 45km above the surface of the earth
  • Function= To absorb and shield the earth from incoming ultraviolet radiation
  • Ozone depletion was noted as a 'Hole' in 1984 in the ozone layer over the Antarctica. Since then a smaller but similar 'hole' has developed over Arctic.

Ozone Depletion

Effects of ozone Depletion

Ozone depletion

Ozone Depletion

Ozone depletion

  • Ozone depletion is caused by a range of manufactored chemicals pollutants
  • eg. chlorofluorocarbons (CFCs) -used in aerosols, refrigerators (Freon Gas), insulting foams (syyrofoam) and Industrial detergents.
  • Some fire extinguishers (halon) and agricultural sprays (fumigants) also destroy te ozone layer

Effects of Ozone Depletion

Increasing ultraviolet levels have a number of effects such as:

  • Increased number of skin cancer, cataracts (the lens in the eyes loses transparency) and the weakened immunity
  • Serious damage to crops and plant life
  • Plankton will be depleted. Therefore this will have a huge effect on aquatic foodchains such as fish, penguins, birds, seals and whales.
  • There might even be less oxygen for the organisms to breath on.

Effects of Ozone Depletion

As said it has a huge effect on the aquatic

The Aquatic

Ways to control Ozone Depletion:

Control of Ozone Depletion

1. A reduction in the use of CFCs (chlorofluorocarbons) = allowing ozone layer to be replenished. Ozone layer is formeed naturally by the rection of ultraviolet light and oxyen

CFCs are replaced by hydrofluorocarbons (HFCs). These chemicals break down much faster than CFCs - Therefore they don't reach the upper atmosphere- and don't cause ozone to break down.

Ways to reduce Ozone Depletion:

2. Do not use sprays or foam products that contain CFCs

Controling Ozone Depletion

Ways to control Ozone Depletion:

3. Fridges should not be dumped in landfill sites.

They should be returned to organisations that will dipose of their CFCs in an environmentally friendly way

Controling Ozone Depletion

Landfill Sites:

Landfill Sites

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