With our sights set on Mars as a potential second home (and the astounding progress we're making toward colonization), it's easy to forget about Earth. But think about pollution, poaching and climate change -- they all show how much is at stake if we don't drive change now.
We found nine Tumblr blogs that will prove useful for any environmentalist, activist or advocate. You'll discover original photography, digestible content and green lifestyle information from non-profits, publications and individuals -- and it's all worthy of a reblog.
Are there other environmental Tumblrs you'd suggest? List them in the comments below.