uare-foot, expandable home in just five days. Now they want to share the sustainable-modular- construction techniques they've developed by publishing the Eco-Building Toolkit. <https://static.kickstarter.com/assets/emails/heart-green- b1c42a8672581b7d49c1e02d7cddS94ed8S39096ff3770df873c15101c02d78f.jpg> chttps://click.e.