I do my part by never watering my lawn. Nobody in my immediate family waters their lawns we just let them turn brown in the summer or in my mother's case, her 3-4 feet of topsoil on her acreage means her lawn never turns brown.. at worst it simply stops growing as fast but still stays green even in mild droughts.
A true progressive would not be watering their lawn and wasting gas to mow it more often. You're not a true liberal if you water and mow large swaths of lawn unless you're using grey water and an electric mower.
I'm not even liberal and I just let er turn brown.
I do keep the sidewalk edged though and do my best to keep weeds from taking the lawn over.