Earth Day San Francisco: The Biggest Moments In Bay Area Environmental History (PHOTOS)

In the Bay Area, our environmentalism is palpable.

From Mt. Tam to Golden Gate Park, from the plastic bag ban to our bay cleanups, from our tree sitters to our red legged frog savers, we've always had a soft spot for Mother Earth, and it shows: just check out our ranking in the US Canada Green Cities Index in the slideshow below.

So today, Earth Day, HuffPost SF is celebrating the biggest moments in Bay Area environmental history. Check out a few highlights in our slideshow below, and add your own in the comments section. Happy Earth Day, everyone!

Great Moments In SF Environmental History