"It's not easy having to go on foot to get everywhere," Mary agrees. Even with the trolley system, there's still some walking to get to the stops, so it counts in her mind. "With my short legs and joint problems, you can imagine... I'm lucky my current job allows me flexible hours."

She straightens up and reaches over her head to stretch, trying to alleviate a sore spot in her back. There's a soft, dull pop and she gives a sigh of relief.

"So you're going to be a farmer? What will you be farming?"