We can say that, in most countries of the world environmental activity exists. There are also certain groups that devotes to community development and social justice also focus on environmental issues. There are also volunteer organizations such as Ecoworld, which concerns totally on environment, an organization based in team work and volunteer work. Know more about environmental organizations and conferences.Some of the well known US environmental organizations includes Natural Resources Defense Council Environmental Defense Fund. These organizations mainly focus on bringing lawsuits. Other US based organizations may include National Wildlife Federation, the Nature Conservancy and the Wilderness Society. Many environmental conferences are also being held globally to discuss the issues of the environment. Some global organizations are World wide Fund for Nature and Friends of the Earth. These organizations circulate information, take part in public hearings, stage demonstrations, and may also buy land for preservation. Smaller groups of organizations such as Wildlife Conservation International mainly focused on endangered species and ecosystems.