I'm car-free because I enjoy the lifestyle.
I mow my yard and don't worry about weeds for simplicity's sake, not to avoid using the chemicals.
I turn off lights when not in use to avoid wasting money on the electric bill.
I keep the heat turned to a reasonable temperature in the winter to avoid wasting money on the gas bill.
I rent a small house. I have no need for a large one, as I live alone (other than my two dogs) and I don't own a lot of "stuff", except bike "stuff".
So, none of this is to be "green", yet I'm probably "greener" than average.