Eco Themed Rooms OH YEAH YEAH YEAH. YEAH RIGHT!?

OH YEAH YEAH YEAH. YEAH RIGHT!? - eco themed rooms

Hello. I'm doing this to compete in the geography and I have a poster with a simple slogan green theme to make. I thought about, or organic traffic. Any currency idea? Especially in transport please. Thanks in advance!

PS Oh yeah, 2 things. First, none of the ad pictures are welcome, as you make it unique, etc., and also I will not be copied, their ideas or slogans, it's a competition, I would like some ideas. Thank you!