A new Asda which uses a biomass boiler and geothermal pumps to heat the store and water it uses, has opened in Liverpool today,
The Bootle store, which claims to be the greenest supermarket in the UK, also features doors on all refrigerated units.
While the measure is expected to save the store eight per cent in energy consumption, the risk is that the doors could hamper sales.
According to the company at one other site where the doors were tested, they resulted in a 14 per cent drop in energy bills, though at two other locations sales dropped.
While the measures do help reduce the store's emissions and energy consumption, some claim that they do not go far enough in addressing the supermarket chain's environmental impact.
Helen Rimmer, campaigner for Friends of the Earth, said: "While green technology can improve the environmental footprint of a building, this is a small part of a supermarket's impact, which includes emissions from food freight and customer travel to stores."
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