Green tea is made solely with the leaves of Camellia sinensis that have undergo ne minimal oxidation during processing. Green tea originates from China and ha s become associated with many cultures in Asia from Japan and South Korea to the Middle East. It has recently become more widespread in the West, where bl ack tea is traditionally consumed. Many varieties of green tea have been create d in countries where they are grown. These varieties can differ substantially due to variable growing conditions, horticulture, production processing, and harvesting time.