Five Iowans are on a “Green Bike Tour” of northern Europe, checking out European energy projects. David Osterberg of Mt. Vernon is leading the group, which is in Denmark. Osterberg says Europeans recognize that global warming is real, and they’re making electricity in a different way. For example, Osterberg toured a plant that provides power to two small towns in Denmark. The plant burns straw from farms in the region, producing electricity. He says it’s part of their overall policy.Osterberg believes straw-powered electric plants could work in Iowa, too.Osterberg says Denmark burns straw, has wind turbines and converts waste into energy. The country will not build another coal-fired plant, according to Osterberg, because coal-fired plants waste two-thirds of the energy that goes into them. It’s day sixteen of the biking group’s 34-day European trip.