Emerson has completed its $1.5 billion acquisition of UK-based critical power vendor Chloride Group PLC, the company announced today. Emerson (EMR) said the acquisition will boost the growth of its solutions for uninterruptible power supply (UPS) equipment and other data center products.

Validating the effectiveness of its energy efficiency initiatives, wholesale data center provider Digital Realty Trust (www.digitalrealtytrust.com) has saved an estimated 10,000 kW annually (worth about $6 to 10 million) at its Bay Area facilities, according to the results of an energy efficiency audit of its San Francisco and Silicon Valley properties.

Social network gets flak from Greenpeace over its planned giant data center in Oregon, but Facebook says its efficiency will be industry-leading.