The orange (Citrus sinensis) is a citrus fruit and originates from China. Growing on trees, the orange reaches a maximum of 10 centimetres in diameter. The fruit flesh is orange in colour, whilst the peel ranges in colour from green to orange. The colour of the orange peel, is dependent on the temperature and climate it is grown in. The green coloured peel appears due to an increased production of chlorophyll, which acts as a sun protector. Hence, in warm climates with a lot of sunlight, the orange peel is green. The orange tree reaches full fruit production after 7 years, and bears fruit for around 25 to 30 years.
