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7 ultra-green extreme sports

By: Shea Gunther on Jan. 11, 2010, 12:30 p.m.
Horse Surfing

Photo: David Spurden

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Horse surfing

Horse surfing was developed in 2005 by British trick riders who strapped on kiteboards and towed themselves up and down beaches behind their horses. Since then it's been adopted by riders around the world and is particularly popular in Australia. A horse's top speed maxes out around 35 miles per hour. Knock off about 10 mph for running in the shallow surf and you get a heart-pounding, CO2-free experience.

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