– Sierra Club is America's oldest and largest environmental organization. Our Kentucky (a.k.a. Cumberland) Chapter works on multiple environmental/conservation issues including clean and sustainable energy solutions, mountaintop removal, air and water quality, sprawl, wild land preservation, endangered species, healthy and sustainable foods/agriculture, global warming, etc. We also offer an exciting outings program. Join us for an outdoors adventure and/or sign up to become a member from our chapter website - we need you!