A survey released today by British Gas has ranked Hull top of a list of 25 cities for in-home energy efficiency.
Glasgow, Newcastle and Portsmouth also scored well, while London - and in particular the borough of Kingston-upon-Thames - was shamed as the least green place in the country.
The energy provider noted that councils in underperforming areas would be well-advised to encourage uptake of green technologies such as cavity-wall insulation and double glazing, both of which can significantly reduce CO2 emissions as well as saving homeowners money on energy bills.
Singling out the importance of heat-trapping devices like reinforced windows, British Gas managing director Phil Bentley noted: "For every £3 we spend heating our homes, £1 is wasted because of poor insulation.
"While strict standards on new builds are needed, most of the energy being consumed is in the ageing homes we live in today. Making changes in these properties will give us the biggest carbon-emission reductions."
The UK's housing stock is estimated to account for 27 per cent of the country's greenhouse gas emissions and a recent Hips survey found that the average home scores a lamentable 'E' rating in terms of energy efficiency.
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