The University of Reading has been protecting the quality of the new crop since 1985，after it took over the task from the Royal Botanical Gardens in Kew，London.And it has improved its facilities.The leader of the institution’s cocoa project，Professor Paul Hadley，says，“One of the main issues concerning cocoa improvement is the supply of reliably clean，healthy，interesting cocoa material.”

　　The cocoa centre has a collection of 400 plant varieties and their greenhouse uses a lot of energy to keep them in tropical conditions.After up to two years in quarantine，clean and safe seeds are sent to some 20 countries，including several in West Africa.That’s where 75% of the cocoa used for chocolate worldwide comes from.The crop is extremely important for the local economy：it employs about two million people.led technicians who look after the collection.And more of us seem to count on them now.

　　The scientist says，“There is some concern within the industry that demand is increasing constantly，particularly in countries like China，where the standard of living is increasing and people are getting a taste for different chocolates.”

　　5．What is the text mainly about?

　　A．Safeguarding cocoa seeds.

　　B．Planting cocoa seeds worldwide.

　　C．Keeping cocoa seeds in greenhouse.

　　D．Finding the new market for cocoa.

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