US banking giant Citi has opened an environmentally friendly data centre in Georgetown, Texas.
Around 50 employees work in the 305,000-square-foot facility, which houses Citi computer systems and components.
The bank says the centre includes programmes that alert operators if mechanical and electrical systems are not at their optimal efficiency to reduce energy waste.
It also uses pollution controls on its generators that remove 90% of the nitrogen oxides from the exhaust and native landscaping and irrigation systems designed to reduce irrigation water consumption by 50%.
The US Green Building Council has awarded the facility Leadership in Energy and Environmental Design (Leed) gold certification.
Marty Lippert, chief technology and operations officer, Citi, says: "Ensuring that our facilities are as efficient and environmentally friendly as possible benefits not only Citi, but also our customers and the community at large."
Last year the bank outlined plans to spend EUR170 million to build one of the "greenest" data centres in the world in Frankfurt.
Morgan Stanley recently moved to apply to build an off-grid data centre powered by tidal energy in Scotland's Pentland Firth. Under the proposals, the data centre power supply would be provided via a private cable linked to an array of tidal turbines that would generate enough energy to power a city the size of Bristol.