The Sierra Club boasts over 1.3 million members worldwide.
I thought it would be good to give the new membership number since the original answer is from over a year ago. The Sierra Club now has its membership posted as 1.4 million members.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC