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We haven't got there yet, but we're proud to have a planting partner who did - Sustainable Harvest International (SHI).
On the June Issue of Oprah Magazine you can a profile of 4 Hotels With an Edge On "Voluntourism", or in other words hotels that "are helping guests plug into charitable projects during their stays."
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"If you don't mind a little mud on your boots, join SHI for daylong projects in the surrounding villages, helping families plant vegetable gardens, build chicken coops, or construct eco-friendly wood-burning stoves."
You can read more about it here - http://www.oprah.com/slideshow/omagazine/200906-omag-volunteer-vacations/2
Yours,
Raz @ Eco-Libris
Eco-Libris: promoting green printing