City Problems - Teenagers' Solutions p.37
Ben Gulak was visiting London.
He soon realised one of the main causes: oil.
In Ben's home town in Canada, the traffic is quite light, but London has a lot of traffic.
Scooters are more expensive and need much petrol.
Back in Canada, Ben started thinking about the problem.
He called his invention Duo.
Ben won a prize for his invention.
These two teenagers noticed two everyday problems in cities.
Ann loved inventing new things from rubbish around the house.
The idea for her first successful invention came from a friend in Malta.
Ann designed a torch that uses just the heat from a human hand.
But Ann's invention won an international science competition with a prize of $26000.
Створюйте онлайн-тести
для контролю знань і залучення учнів
до активної роботи у класі та вдома
