Wind greatly affects the growth of plants. Most plants produce flowers containing separate male and female sex cells. Male sex cells are called ‘pollen’ and the process of joining them with female sex cells is called ‘pollination’. Some plants pollinate themselves, but most rely on their pollen being carried to another plant before a new plant can be formed. This is called ‘pollination’, ‘cross-pollination’ and ‘self-pollination’. The wind carries or transfers the pollens which are very light, from male to female parts of flowers and ensures that fertilization can take place.