Business Green: More than 40 per cent of UK firms are unaware that water use contributes to their carbon footprint, according to a new survey from the Environment Agency. An estimated one per cent of the electricity purchased in the UK is used to treat and provide water, resulting in carbon emissions of about four million tonnes. But according to the poll of 500 UK businesses, many remain unaware of the link and as a result are failing to prioritise efforts to curb water use. The research also …