One thing I go on about on this blog is how in many ways we benefit rather than sacrifice when we change our lifestyles and public policies in order to treat the planet more kindly (see here and here, for example). Because very often, making the planet more healthy makes the people more healthy, too.
My little family and I have found this, for example, in eating unpackaged, local, seasonal and vegetarian (you can read why this helps the environment here). The result of altering out diet for the sake of the planet is that we eat no processed food and a lot more fresh fruit and vegetables. Our eating is much healthier than it used to be.
This graphic, provided by Transportation Alternatives, shows that similar benefits come from biking, walking and using public transportation. What it shows is that when we use our cars less--one of the most important things we can do to help the planet-- and other modes of transport more, we end up skinnier and healthier.
Go figure. What's good for the planet is good for us, too.