Gasoline prices over $3 a gallon, dire warnings about greenhouse effects and increased pollution bringing about global warming are causing some folks to think more about energy alternatives.Claude Sapp, principal for Infinifuel Biodiesel, is one of those folks, and now he is working to turn the oldest geothermal plant in Nevada into a biodiesel processing facility, where camelina oil seed and even algae is becoming diesel fuel.Sapp said any plant that produces high oil yields can someday power a vehicle."Biodiesel is made from vegetable oil instead of petroleum," he said. "We can get it from crambe, canola-type plants, oily seeds, …