Which of the following is NOT an advantage of biogas? (A) It is a cheap source of energy (B) It is available in large quantities in rural areas (C) Its residue is not harmful and can be used for agriculture (D) It can be used for lighting purpose
Option B. An unfortunate disadvantage of biogas today is that the systems used in the production of biogas are not efficient. There are no new technologies yet to simplify the process and make it accessible and low cost. This means large scale production to supply for a large population is still not possible.
