Food production
What does an increase in human population require?
requires an increase in food yield
Whats two ways to increase crop yield
Pesticdes:
Chemicals used to kill pests that damage crops
Fertilisers:
A subtance added fo the soil to increase its fertility
Where are nitrates dissolved?
Nitrates are dissolved in soil water and are absorbed by roots.
What are nitrates used to produce?
Nitrates are used to produce amino acids which are synthesised into plant proteins
Animals then comsume plants or other organisms to obtain amino acids
(Fertilisers are added to the soil to increase the nitrate content of the soil)
problems with fertilisers
Fertilisers can leach into fresh water, causing an algal bloom.
This leads to a reduction in oxygen levels