Biology B3 4.2 Land and water pollution.

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What are humans responsible for doing to the environment?
Polluting both land and waterways.
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How do humans cause pollution on land?
Through sewage, household and industrial waste, farming methods, herbicides and pesticides and chemical fertilisers.
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How do humans cause pollution in water?
Contamination from herbicides, pesticides and chemical fertilisers, untreated sewage and toxic chemicals from landfill.
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Wha is sewage?
Sewage is waste which contains human body waste and waste water from our homes.
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What happens to sewage to reduce risk?
Sewage must be treated properly to remove gut parasites and toxic chemicals or these can get onto the land.
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How does household and industrial waste cause pollution?
Large quantities of household and industrial waste are placed in landfill and toxic chemicals leak out, some industrial waste is very hazardous (e.g. radioactive waste).
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What are herbicides?
Weedkillers.
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What do pesticides do?
Kill insects.
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How do herbicides and pesticides cause pollution?
The are poisons, when sprayed onto crops can get into the soil and into the food change, many of them are washed into rivers.
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How do chemical fertilisers cause pollution?
They can get washed into rivers.
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How do herbicides, pesticides and chemical fertilisers cause water pollution?
They all get washed into rivers and streams.
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How do fertilisers and untreated sewage cause water pollution?
They can cause a high level of nitrates in the water.
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How do toxic chemicals from landfill cause water pollution?
They leak into the waterways and pollute the water, killing organisms such as fish.
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***MAKE SURE YOU KNOW HOW HUMANS POLLUT LAND AND WATER**
**MAKE SURE YOU KNOW THE EFFECT HUMAN POLLUTION HAS ON OTHER ORGANISMS***
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Other cards in this set

Card 2

Front

How do humans cause pollution on land?

Back

Through sewage, household and industrial waste, farming methods, herbicides and pesticides and chemical fertilisers.

Card 3

Front

How do humans cause pollution in water?

Back

Preview of the front of card 3

Card 4

Front

Wha is sewage?

Back

Preview of the front of card 4

Card 5

Front

What happens to sewage to reduce risk?

Back

Preview of the front of card 5
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