It is clear that the use of traditional fossil fuels to power vehicles and create the electricity is not sustainable. In certain countries plans have been made to remove petrol and diesel powered cars over the next 15 to 20 years. Both universities and companies are researching appropriate replacement technology and advances in this technology are occurring all the time. ____ , companies and governments are spending more and more on research into renewable energy such as solar power, which can provide cheap energy in the sunny areas of the planet. Wind farms ____ provide a good source of alternative energy, this time for colder, cloudier northern countries such as the UK. ____ , we are seeing big changes in the way that energy is produced in many parts of the world.

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