Susan Carpenter, who writes about cars and motorcycles for the LA Times, turned her house into an experiment in being green and sustainable. About three years ago, she volunteered to try pretty much everything and anything that could turn her house, and her lifestyle, into a model of eco-friendliness. This included using a composting toilet, installing solar panels, and much more. She joined Madeleine in the studio recently. However, before Madeleine got around to asking her why she'd taken on such a task, she asked her to describe the first thing she did on her big green adventure.