Food security - Ability for all people to access food in a way that does not harm the environment, Fertiliser - Chemicals that contain minerals that help plants grow, Pesticide - Chemicals that kill insects and pests that cause crop damage, Biological control - Control of a pest species by using natural predators, Herbicide - Chemicals that are applied to kill the weeds that compete with crop plants, GM crop - Crops that contain genes from other species that give them improved features., Organic farming - Use of natural methods to increase crop growth without using chemicals., Nitrogen - Element in fertiliser to ancourage leaf growth, Potassium - Element in fertiliser that encourages fruit growth, Phosphorous - Element in fertiliser that encourages root growth, Bioaccumulation - Build up of pesticides to toxic levels.,

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