Green Volunteers lists over 200 projects worldwide for those who want to experience active conservation work as a volunteer. Projects are in a variety of habitats and countries, lasting from one week to one year or more. Projects involve volunteer work in wildlife rehabilitation centers, national parks, and protected areas, and general conservation work with a variety of animal species. The guide has 3 indexes set up by geographical area, animal species, and project cost, all to help prospective volunteers choose their favorite conservation project. Almost all the projects are open to anyone without previous conservation experience, and most projects do not have language requirements.