RODALE NEWS, STATE COLLEGE, PA—This week Rodale.com will continue reporting on the 2011 Pennsylvania Sustainable Agriculture Conference, which featured the latest information about organic and sustainable living, including the looming threat of GMO crops. Here's a look back at last year's keynote speaker, featuring fantastic examples of architecture that uses repurposed materials.

Times are changing. Clean-water shortages, a changing climate, and dwindling oil reserves loom before us. But as the face of our planet changes, our houses that guzzle up all these resources, for the most part, aren't adapting. And maybe humans aren't as great at adapting to life on Earth as we think. "In effect, it's like we landed on the Earth, because we don't know how to live here," says Michael Reynolds, creator of the sustainable-building company Earthship Biotecture. As the keynote speaker at this year's Pennsylvania Sustainable Agriculture conference, Reynolds explained how the "sustainable" concept can apply to architecture as well as agriculture.