Lamp runs for 8 hours on one glass of water and some salt

Lighting is something that we take for granted in the developed world, but there are still many areas around the globe where people lack reliable access to light at night. They often use kerosene lamps, which contribute to indoor pollution and have to be refilled with oil regularly. Aisa Mijeno, an engineering professor who worked for years with Greenpeace Philippines, noticed during her work there that many indigenous people in the over-7,000 islands that make up the country were using kerosene lamps exclusively for lighting. The family she lived with there would have to climb down the mountain that they lived on and then walk an additional 30 km to the nearest town in order to get more oil to fuel their lamps.