Electricity from rural cellphone towers in poor countries could chill vaccines, saving 5 million lives every year, say Harvey Rubin and Alice Conant.

Biomass gasification is deemed as one of the best ways to power rural households across the world. It is basically the conversion of solid biomass (wood, agriculture residues and so on) into a combustible gas mixture known as Producer Gas. In India, small-scale biomass gasifiers have been installed in various states.