The consumption of tea started in 2737 B.C in China. Shen Nong, a chinese emperor accidentally invented the tea. In 59B.C. Wang Bao wrote in his book how to buy and prepare tea. In 22.C.E the abilities of tea were mentioned by physician. During 1200-1500 B.C. Tea became ordinary drink in china and Japan. However, during 1600, the Dutch introduced tea in different parts of Europe. In the 18^th century, cultivation of tea plants in India started by East India Company. However, during 1900-2000 different parts of world exported tea. By 2012 over 40 countries started producing tea.