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'''World Wide Opportunities on Organic Farms''' (sometimes Willing Workers on Organic Farms) is a grassroots organization that brings together organic farmers and farmhands. They have a small yearly membership fee in many countries, which covers the cost and continued production of the WWOOF handbook & listing for the area. Stays can last from several days to months (or even years) on end. WWOOFing and hitchhiking can compliment each other nicely.