Chocolate lovers in Europe are contributing to the preservation of one of the world's biodiversity hot spots.

São Tomé, an island off the west coast of Africa is home to many unique species of flora and fauna.

Protected land is increasingly coming under pressure as impoverished people cut down trees for firewood and construction.

But now a project to revitalize the growing of cocoa, the raw material for chocolate, could reverse that trend.

Joanne Levitan reports

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