Gobsmacked. Yep, that’s me. ‘Why’, you ask? ‘Let me tell you’, I answer. Because of this man: Mr Moser. Alfredo Moser. Inventor of the bottle light. In 2002, the Brazilian mechanic had a light-bulb moment and came up with a way of illuminating his house during the day without electricity - using nothing more than plastic bottles filled with water and a tiny bit of bleach. In the last two years...

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