cm30 - Energy and conservation What are our main energy...

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Energy and conservation
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What are our main energy sources? Industrialised countries need large  amounts of energy Most of this energy comes form  fossil fuels which are burnt in power  stations, factories, homes and  vehicles These fossil fuels formed millions of  years ago, and are non-renewable Once the fossil fuels have been used  up there will be no more to replace  them
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Oil is useful for other things too Oil is a mixture of different  compounds We can separate these  substances by a process  called  fractional distillation These fractions include  fuels like  petrol, diesel and  aviation fuel Parts of oil are also used to  make  plastics, medicines,  paints, dyes and even wax  candles
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Problems with burning fossil fuels Huge amounts of  carbon  dioxide  are given off  into the atmosphere  Carbon dioxide causes  global warming  or the  greenhouse effect coal-burning power  stations also give off  sulphur dioxide  gas  which leads to  acid rain
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What is the greenhouse effect? Carbon dioxide gas acts 
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cm30 - Energy and conservation What are our main energy...

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