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Form 9 Theme: Inventions and Inventors. Hello there, Read the text and do tasks. 1 Hippo-Roller, photo ………….. Many women and children in Africa spend between three and nine hours a day carrying water to their homes. They use 20-litre plastic buckets, which they carry on their heads. The buckets are very heave and often cause back and neck injuries. So engineers Pettie Petzer and Johan Jonker designed a ‘rolling wheel’ which can carry ninety litres of water and is much easier to move. 33,000 ‘Hippo-Rollers’ have been made and delivered to remote villages in Africa. The results are good: women have more time to look after their families, the children have more time at school, and there are fewer injuries. 2 LifeStraw, photo ………….. There are 780 million people in the world who don’t have clean safe drinking water. This fact led the Swiss company Vestergaard to invent a special kind of straw that allows people to drink dir...

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