Topic 20: Human Impact
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Agricultural machinery
Has replaced humans and improved efficiency due to the ability to farm much larger areas of land
Insecticdes and herbicides
These chemicals kill off unwanted insects and weed species meaning that there is less damage done to plants and fruit loss to insects as well as reducing competitoon form other plant speciecs.
Chemical fertlisers improve yields
fertalisers increase the amount of nutrients in the soil for plants meaning that they can grow larger and produce more fruits.
Selective breeding.
animals and crop plants which produce a large yield are selectively bred to produce breed that reliably produce high yields.
Monoculture farming
On a given area of agricultural land only one type of crop is grown
Biodiversity
The number of specieces that live in a particluar area.
Sustainable development
Development providing for the needs of an increasing human populatiob without harming theenvironmet.