The agreement with developer Chermac Energy is the latest ina string of deals by Google to increase its exposure to renewables, either asa project investor or a consumer of power.

The search-engine behemoth will use renewable energy credits(RECs) accompanying the power to offset consumption at its Mayes County, Oklahomadata centre. It has signed five such contracts in a bid to “green” its hugelypower-intensive data facilities around the world.

Google said the Texaspower purchase agreement (PPA) is its largest yet and takes its total to more than 570MW.