There is no wave without wind. -- Chinese Proverb
无风不起浪
There is no smoke without fire.
Overview
Listening and discussion EnergyReading and language A dream of hydrogen economyBusiness skills Problem-solvingCase study Energy saving at Supersun
Discussion
A
Discuss these questions
1. Which one of these devices is not essential in your life?the planethe carthe mobile phonethe computerthe fridgethe televisionthe liftthe light bulbthe mocrowave oventhe washing machine


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