Fact 1: kerosene lamps are bad for lungs. Fact 2: kerosene costs money. Sunshine is free. Fact 3: when kerosene lamps are replaced by solar lanterns, there's a great saving in lives and money. (Furthermore, each solar lantern with a life expectancy of 60 years, also saves a tonne of carbon every 10 years). Buy solar lanterns for villagers in Africa.