Food security: Having reliable access to enough safe, nutritious food to maintain a healthy and active life. It is threatened by a growing human population, climate change, drought, flooding and conflict.
Food supply: The total amount of food available to a population, which humans try to increase using modern farming methods such as machinery, fertilisers, pesticides and selective breeding.
Modern technology in food production: The use of machinery, chemicals and improved breeds to raise crop and livestock yields, which boosts output but can damage soil, water and surrounding ecosystems.
Agricultural machinery: Powered equipment such as tractors and harvesters used to farm large areas quickly and with fewer workers, increasing the area cultivated and the yield obtained.
Chemical fertiliser: A manufactured substance added to soil to supply mineral ions such as nitrate and phosphate, helping crops grow larger and produce a higher yield.
Pesticide: A chemical used to kill organisms that damage or compete with crops, including insecticides and herbicides.
Insecticide: A chemical used to kill insect pests that feed on or damage crop plants, reducing losses and increasing yield.
Herbicide: A chemical used to kill weeds so that crops face less competition for light, water and mineral ions.