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Many poor countries have replaced toxic kerosene lamps with clean solar lamps. When the kerosene candle wick is burned it creates toxic gases that many people die from and that isn't the only problem still today many people around the world don't have the luxury of the light switch and people do many things by day light or the toxic candles.When people use fuels to burn candles and fires they use 77 billion liters of the worldwide fuel. It also costs about 38 billion dollars annually.Now they are replacing candles with solar powered lamps and gadgets.