A group of environmentalist people who supports the preservation of natural environments, politically as well
Volunteering means campaigning for change, such as getting involved with a local environmental pressure group to stop logging in a rainforest, or supporting a global drive to abolish landmines.
Any association of individuals or organizations, usually formally organized, that, on the basis of one or more shared concerns, attempts to influence public policy in its favour
A pressure group is an organized group of people who are trying to persuade a government or other authority to do something, for example to change a law. the environmental pressure group Greenpeace. An interest group that endeavors to influence public policy and especially governmental legislation, regarding its particular concerns and priorities. a group or organization that tries to influence the opinions of ordinary people and persuade the government to do something interest group