WHAT DO POOR PEOPLE IN COUNTRYSIDE DO TO HAVE ENERGY

29. What do poor people in countryside do to have energy? A. They look for coal B. They gather fuel wood C. They look for oil D. They use gas cookers 30 What is the main use of biogas? A. It is used mainly for cooking and heating. B. It is mainly used for lighting. C. It is mainly used for operating. D. It is mainly used for producing in factories.