11) Plant plants!
12) Support Bio-Diversity and not get your lawn treated for weeds unless you have a really wierd medical condition.
13) Protect the water supply and don't use chemichals on your yard!
14) Tell everyone including the government about the dangers and effects of lawn treatment and ask them not to!
15) Conserve!
16) Support the research of alternative-energy sources. I never really liked that phrase.
17) Compost whatever you can!
18) Use bio-degradable substances!