Keep the Earth clean, it's not Uranus

I've been talking a lot around home about reducing our carbon footprint. And when I saw this 'Keep the Earth clean, it's not Uranus' t-shirt I thought, 'Hey, I should get these for the entire iFlipFlop clan.' Then again, maybe we should just start with conserving resources and buying locally. I don't know if my neighbors would get the joke as they drive by in their giant SUVs plastered with 'Support the Troops' yellow ribbons.