Environmental Projects:
Frontier — www.frontier.ac.uk. Frontier offer an array of environmental conservation and education projects across the world. They also offer a lot of other international programmes based in the community and at grassroots level. They a large organisation with many years experience and enough projects to cater for anyone's taste.
Raleigh International— http://www.raleighinternational.org/about-raleigh/ sustainability. Raleigh International offer some great sustainability programmes across the world. Generally they work in partnership with the local communities to develop projects. Also if you are over 25 years old there are opportunities to lead your own sustainability expeditions!
Conservation Volunteers - www.conservationvolunteers.com.au. Conservation Volunteers recruits volunteers from Australia, New Zealand and around the world to work on important environmental and wildlife conservation projects. Founded in 1982, the non-profit organisation has grown to become the largest practical conservation organisation in Australasia with offices in most capital cities and many regional centres across Australia and New Zealand. They give people the chance to connect with the environment. So if you’d like to get involved and make a difference, follow the link above.