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Title: Human activity and the environment
Description: This is all information needed to know about the human activity and the environment and the link between them
Description: This is all information needed to know about the human activity and the environment and the link between them
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Human Activityand the Environment
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can
It's also due to modern farming methods which
many more hungry
provide more food, needed for so
mouths
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1000
1200
1400
1600
2000
As the human population increases:
•
being used up,
Raw materials, including non-renewable energy resources, are rapidly
•
More and more waste and rubbish are being produced,
•
nitrates from fertilisers and
More pollutants are being produced like phosphates from detergents,
sulphur dioxide from coal burning power stations
...
necessary for modern farming
...
This is because the crops
food
Without fertilisers crops wouldn't grow as well, and this would reduce
for plant
Remembernitrates are
take nitrates out of the soil and these nitrates must be replaced
...
Problems with Fertilisers
...
This is called
and rivers
...
1
...
The high concentration of nitrates and
phosphatescausethe rapid growth of
surface plants and algae
...
Some plants below the algae
layer and algae in the bottom parts of the layer
start dying, due to competition for light,
and stop producing oxygen through
photosynthesis
...
Oxygen levels in the water decrease
...
Microbes that feed on the dead remains of the
plants and rapidly increase in numbers and
use up more oxygen from the water in their
respiration
...
Oxygen concentrations in the water decrease
further, so fish and aquatic animals suffocate,
due to lack of oxygen, and die
Title: Human activity and the environment
Description: This is all information needed to know about the human activity and the environment and the link between them
Description: This is all information needed to know about the human activity and the environment and the link between them