As diesel prices soar, Bolivian farmer turns trash into tractor fuel
By Sergio Limachi LAJA, Bolivia, Oct 13 (Reuters) — In the Bolivian Altiplano, where rising fuel costs are threatening farmers' livelihoods, local resident Etson Machaca built a small plant that turns plastic bags, old tires and used oil into energy for his tractors. Though the operation is small, producing only betwee