Three-quarters of British households are wasting £68 million a year by overfilling the kettle, according to a new report.
The study by the Energy Saving Trust Foundation found that many small changes to the way we use water could result in big savings on energy bills.
Some of the areas where the biggest savings could be made are by reducing time spent in the shower and by using a modern dishwasher rather than washing by hand.
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In an interview with The Sunday Telegraph David Cameron has set out a series of policies designed to appeal to traditional Tory voters.
Nick Clegg will attempt to win over the female electorate when he kicks off the Liberal Democrats' general election campaign later today.