By Richard Horgan Los Angeles (Knewz) — It was supposed to be a one-time thing on April 22nd to celebrate Earth Day. But six months later, parents in northeast Portland, Ore. are making a habit Wednesday mornings of standing outside their homes and cheering on hordes of students making their way to Alameda Elementary on bicycles rather than by bus and car. The “bike buses” led by physical education teacher Sam Balto have firmly taken hold, with local and national media coverage a regular part of the fall semester. “We were impressed by how many kids and parents showed up to the Alameda Element…