"Walk into a row of greenhouses in rural Britain, and a late English-winter day transforms to a swampy, humid tropical afternoon. You could be in Latin America or Sub-Saharan Africa. Which is exactly how cocoa plants like it."

"'It's all right this time of year. It gets a bit hot later on in the summer,' says greenhouse technician Heather Lake as she fiddles with a tray of seedlings — a platter of delicate, spindly, baby cocoa plants."

"Since she started working here at the International Cocoa Quarantine Centre, eating chocolate doesn't feel the same."