food & medicine
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Forests are often cleared to make way for large fields of a single food crop. Photo credit Corel Photo Clipart CD.

Twenty species of plants provide 90% of the world's food, and just three of these plants supply more than half -- wheat, maize, and rice. These three plants are mostly suited to cooler climates, while much of the world's population inhabits the tropics.
There are about 30,000 plants that are edible or partially edible, but only 7,000 have ever been collected or grown as food crops.

The winged bean of New Guinea has the potential to become an important food crop. The entire plant is edible -- the leaves, the seedpods, the seeds than can be cooked or ground into flour or even used to make a coffee-like beverage, and the tubers that have more protein than potatoes. The wing bean also raises soil fertility, and it can grow over four meters in just a few weeks.

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[temperate forests] [tropical forests] [plants] [seeds] [leaves] [soil]

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