B3 4.2 Land and water pollution

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how does sewage pollute land?
sewage contains human body waste and waste water from our homes, it can contain parasites and toxic chemicals that get onto the land
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why does landfill cause pollution?
toxic chemicals leak out when large quantities of waste are placed in landfill. some waste can be radioactive
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why do farming methods pollute the land?
herbicides (weedkillers) and pesticides (kill insects) are poisonous and are sprayed onto crops, can get into soil and food chain and can eventually be washed into the rivers
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name another way farming methods pollute the land
farmers use fertilisers to keep the soil fertile and can be washed into rivers
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what can get washed into the streams?
fertilisers, herbicides (weedkillers) and pesticides (insect killers) untreated sewage and toxic chemicals from landfill
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what can fertilisers and untreated sewage cause?
a high level of nitrates in the water
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what happens when water becomes polluted?
organisms such as fish are killed
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Other cards in this set

Card 2

Front

why does landfill cause pollution?

Back

toxic chemicals leak out when large quantities of waste are placed in landfill. some waste can be radioactive

Card 3

Front

why do farming methods pollute the land?

Back

Preview of the front of card 3

Card 4

Front

name another way farming methods pollute the land

Back

Preview of the front of card 4

Card 5

Front

what can get washed into the streams?

Back

Preview of the front of card 5
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