I've had several things to say about lawns. In the spirit of trying to offer alternatives, I will simply point you to an article from the UK both about the problems of lawns and the possible ways to deal with the problems. It is possible to live with beautiful gardens without pesticides, herbicides, fossil-fuel-burning and polluting lawn equipment, and water waste.
Of course, in the US, homeowner associations call the shots and insist on the destructive practices that the Guardian article is warning against. What is the solution? Fight the HOAs. Demand an end to environmentally destructive deed restrictions. We are not fighting to save the Earth. We are fighting to save ourselves.