Read the article and match the highlighted words with the definitions.Example: 0 An action, movement, or sound that gives information, a message, a warning, or an order.Answer: signal Light in a bottleThis is such a simple idea! It’s a light bulb that needs no electricity, no plugs, no cables and costs absolutely nothing to run. It wasn’t invented by a famous scientist but by a local man in Brazil more than ten years ago. In his hometown at the time, they had problems with electricity and people’s homes and small businesses were often left in the dark. One day, Alfredo Moser and his friends were talking about how they could create a signal in an emergency. One of them suggested using a bottle to reflect the light from the sun. This made Moser think. Why not use water to make light?All you need is a clean plastic bottle. Fill it with water from the tap and close it with a blacktop. The blacktop attracts the sun. A drop of bleach, the kind you use to clean the house, is added to the water to keep it clean. Then a small hole is cut in the roof of the room where you want the light, and the bottle is pushed through the hole. While there’s sunlight outside, the light will be carried through the water into the room below. And it’s much stronger that’s a light from the candle!Moser shared his idea with his neighbors and his light bottles were installed in the local supermarket. Ten years later, an organization in the Philippines heard about Moser’s idea. The MyShelter Foundation helps people in poor areas and specializes in building houses using recycled materials. Now there are Moser lamps in more than 140 000 houses throughout the Philippines and the idea has spread to a number of other countries, too. In India, the bottles are used in rural schools and to grow food, In Bangladesh, the lights are installed in small businesses. Moser has not made a lot of money from his invention, but his lamps have definitely made life easier for a lot of people!