Inventions that will save the world

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Across
  1. 3. this is an ecological light source that works with salt and water
  2. 4. you can cook using only the sun
Down
  1. 1. manufactures furniture from broken pieces of wood, using an ecological resin to repair them
  2. 2. works as a filter for water and collects trash
  3. 5. nozzle. device that is installed in the tap you have at home