1. How many phones?
c) Over 1,000!
Each medal weighs about 600 grams; each phone contains about half a gram of precious metal – about half the weight of an M&M
2. How much gold?
c) About 1%
Yup, it’s a swiz! “Gold” medals are mostly made of silver, with just a little coating of gold on the outside. Solid gold would cost far too much!
3. Where from?
Louis-Matisse has found parts of a fisherman’s plastic buoy that he could tell came from the U.S. state of Maine, 5,000 km from his home in Cornwall, southwest England. He also finds plastic from Canada, which is not so far.
4. Five what?
The rings “symbolise” the five continents of planet Earth and are meant to show that the Olympic Games brings together the whole world in peace.
Plastic bottles can be turned into the insulating padding for winter jackets and into insulation that stops houses losing heat through the roof.
Waste paper can also be used to make house insulation and some people even turn it into furniture.
Throwaway “paper” cups from coffee shops are rarely recycled because they are made of a complicated mixture of paper and plastics.
Coffee grounds, like other food waste, can be used to make fuel for vehicles. There has been an experiment to power London buses with used coffee beans.