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Spanish energy giant accelerates renewables strategy on the back of strong growth in the US and UK

Sales up 37 per cent, but customer growth slower than expected

Demand for green power continued to climb last year despite economic crisis

Large numbers of firms unaware that water use leads to increase in carbon footprint

Key players on both sides of Atlantic call for major new initiatives to accelerate the development of greener homes

Developer of insulated building panels working on plans to integrate solar technology into buildings' walls

New green energy tariff allows firms to select how much renewable energy they want and where they want it from

The Japanese firm has improved its SCiB technology and aims to underpin emerging electric cars

Transmission lines will carry wind generated electricity from the Midwest to urban areas

Mayor reportedly fuming over prime minister's premature announcement