Earthwatch Institute

www.earthwatch.org

This global conservation charity places volunteers on scientific research expeditions in over 50 countries, with the aim of promoting the understanding and action necessary for a sustainable environment. More ›

Greenpeace

www.greenpeace.org

Greenpeace's mission: to use non-violent, creative confrontation to expose global environmental problems and force solutions. More ›

WWOOF

www.wwoof.org

Well respected and long standing, WWOOF organisations compile lists of organic farms that host volunteers. More ›

Biosphere Expeditions

www.biosphere-expeditions.org

This group offers volunteers the chance to be involved in hands-on wildlife and conservation research alongside local scientists in locations around the globe. More ›

2Way Development

www.2way.org.uk

This organisation arranges individual volunteer placements by matching the skills of participants with appropriate needs within grass-roots development organisations in the developing world. More ›