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Plants are a source of carbohydrates and oils which can be used for food, fuel and many everyday products. Carbohydrates are compounds which contain the elements carbon, hydrogen and oxygen.

It is important to ensure that plants have the correct nutrients to ensure sufficient food production. There are three main elements required for plant growth; nitrogen, phosphorus and potassium.

All of the naturally-occurring elements on planet Earth were made inside stars. Stars can join together protons, neutrons and electrons to form larger elements. This process is nuclear fusion.