One of the shared concerns of all types of environmentalism is opposing pollution. In this sense, most people in the world are "environmentalists" since hardly anyone wants to breathe air choked with fumes or swim in dirty water. For people in underdeveloped countries, the problem is often finding clean drinking water... Environmentalism usually refers to the ideology of any environmental movement, and can refer also to advocacy, legislation and treaties. Note that conservation movements, ecology movements, peace movements, green parties, green- and eco-anarchists often subscribe to very different ideologies, while supporting the same goals as those who call themselves "environmentalists". To outsiders, these groups or factions can appear to be indistinguishable. http://www.wikipedia.org/wiki/Environmentalism
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