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Ger Bemer, Chief Executive Officer at Royal Nedalco, is sure that the first cellullosic ethanol we will have at the pump will come from a yeast process, not bacteria. According to him, bacteria are too sensitive to infections and this makes the R&D process slow, because companies have to take smaller steps until they can find a stable method for obtaining ethanol from switchgrass. Mr. Berner says that yeasts, on the other hand, are more resistant, have been used by the industry for more year

Let's check out another method which promises to deliver cheap ethanol from something that's not edible. According to Mercedes Ballesteros, a scientist working for the Unidad de Biomasa del Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Ciemat), ethanol can be obtained from urban solid waste (aka, home garbage).