Green Code for Travel

We need a Green code for our Travel theme. If you can think of any, could you please send them onto your class teacher. 
Here are some examples:
Sample Green Codes
        1.Be Green, be clean,       
        Make our environment a dream,
        Scoot, cycle or take the bus,
        All together now a Bualadh Bos!
 
       2. Walk to school,       
       Use your own fuel,
        Cars cause pollution,
        Walking is the solution.
 
        3.Park and stride and walk with pride.