A handbook is being published for CIOs in central and local government with a range of regulations on green IT practices.
The handbook will be published in January and will contain information and regulations on nearly every area of IT, including mobile phone use, printers and a code of conduct for datacentres.
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The targets may be updated next September, after the current proposals have been reviewed.
Catalina McGregor, the deputy green ICT champion at the Cabinet Office, said CIOs across government are keen to adopt greener practices.
"Both the central government and the local government CIO councils have agreed to take this up and deliver it," she said.
The government has implemented a range of initiatives recently in an attempt to reduce the carbon footprint of its huge IT estate.
McGregor is also working on stopping criminals exporting huge amounts of IT waste to developing countries, where it is causing environmental and health problems.