"Save the Planet" -- as a rallying cry for environmentalism -- has got to be one of the most tragic cases of mis-branding I know of.
When there's a choice between things you want or need now vs. "the planet" or "the environment", it's too easy to say "I don't care that much whether this or that species goes extinct," or "the planet can fend for itself."
The thing is, though that "the planet" isn't really in danger. It's going to keep revolving around the Sun regardless of what we do. "Life on Earth" will too. Even in the worst-case scenarios, we humans almost certainly won't manage to wipe out all life.
All human life -- all of the planet's potential to support human life -- well, that's a different story.
One of the most amazing and wonderful things about the human species is our capacity to think about the future, and to make decisions based on their consequences.
But are we good enough at it to save ourselves?