What is biogas? Where in India are biogas plants set up and why?

(i) Shrubs, farm waste, animal and human waste are used to produce biogas.

(ii) Biogas plants are set up at municipal, cooperative and individual levels.

(iii) These plants are set up in rural areas since they provide twin benefits to the farmer-

(a) They provide energy to the farmer

(b) Improved quality of manure is available.