I would join Greenpeace. Greenpeace was founded in British Columbia, Canada in 1971. The reason why it was formed was to oppose the United States from testing nuclear devices in Alaska. Later the organization began focusing on issues like global warming, whaling, bottom trawling, nuclear power etc.
Greenpeace is trying to address numerous problems that we people are facing today such as climate change. Greenpeave also tries to defend oceans by challanging wasteful fishing.
They are protecting forests, and animals, plants and the people as well. Greenpeace is trying to eliminate nuclear weapons.
They are working on creating a safer, toxic free World for everyone.
For all these reasons I would join Greenpeace.