“[I]t's not a problem of the mud... or earthen architecture, but... a problem with our economic system. ...[W]e have to readjust our system and... have a higher price on materials that have... high embodied... energy {{w|resource}}s... and [that] create a lot of carbon emissions. So we... have to tax those, and... decrease the taxes on human labor... [T]hat would completely change our economic system... [and] our social system. ...[I]t would not just make a few people rich, but... would... make... a strong middle {{w|class}}, and really build up {{w|people}}...”