When the sun goes down over large swathes of the developing world, the 1.3 billion people currently living without access to an electricity connection are plunged into darkness.

According to figures from the International Energy Agency, at least 20% of the planet’s inhabitants are still without the simple luxury of a light-switch.

From the shantytowns of Sub-Saharan Africa to the sprawling slums of the Indian sub-continent, night-time brings with it a noxious ritual of candles, gas lamps and open fires.

via Solar lamps replace toxic kerosene in poorest countries – CNN.com.