Edmonton Journal: Peter Amerongen was a self-described hippie building log houses in the 1970s when the energy crisis hit. That’s when he started designing decidedly more airtight and insulated houses — a baby step towards his latest project, a hyper-efficient duplex that produces at least as much energy as it consumes. “Then it was about scarcity. I was convinced nothing was infinite and that we needed to save energy for future generations.” View Larger ImageThe Riverdale NetZero …