<p>Famously called the "champagne of teas", it is grown in 87 gardens in the foothills of the Himalayas in Darjeeling in West Bengal state. Some of the bushes are as old as 150 years and were introduced to the region by a Scottish surgeon. Half of the more than 8 million kg – 60% of it is certified organic – of this sought-after tea produced every year is exported, mainly to the UK, Europe and Japan. The tea tots up nearly $80m (£60m) in annual sales. Darjeeling tea is also one of the world’s most expensive – some of it has fetched prices of up to $850 (£647) per kg. The tea is also India’s first Protected Geographical Indication (PGI) product.</p>
