1) 1 50 / 97 percent of the Earth’s water is salt water. a) 50 b) 97 2) 2 The biggest user of water in the home is the shower / toilet. a) shower b) toilet 3) 3 It takes 16 / 168 litres of water to make the coffee beans for one cup of coffee. a) 16 b) 168 4) 4 It takes 1,500 / 15,000 litres of water to make a smartphone. a) 15,000 b) 1,500 5) 5 Most car journeys in the UK are under eight / twenty kilometres. a) eight b) twenty 6) 6 The average person breathes 1,500 / 15,000 litres of air per day. a) 15,000 b) 1,500 7) 7 Air pollution is more / less dangerous than land and water pollution. a) more b) less 8) 8 Indoor air pollution (from gas ovens and cleaning materials) is over two / twenty times worse than the air outside. a) two b) twenty

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