Green computing, or green information technology (IT), refers to environmentally sustainable computing. It is the study and practice of using computing resources efficiently by designing, manufacturing, using, and disposing of computers, servers, and associated subsystems (such as monitors, printers, storage devices, and networking and communication systems) with minimal or no impact on the environment. Green computing strives for economic practicality and improved system performance while satisfying social and ethical responsibilities. Green computing includes the dimensions of environmental sustainability, energy efficiency economics, and total cost of ownership (which includes the cost of disposals and recycling)."[1]

Green computing can be made more sustainable in several ways including:

  • Placing the computer in hibernation mode
  • Switching the computer screen off instead of using screensavers
  • Turning the computer off when it is not in use

Each of these examples can save power. More efficient coding means computers use less power and need less powerful hardware.

Related projects[edit | edit source]

Energy-efficient computers[edit | edit source]

The maker of the low cost Inveneo computer claims to use one-sixth as much electricity as a typical personal computer.[1]

Energy Efficient IT Architecture[edit | edit source]

Using low power disk-less thin clients can save considerable power.

One way of doing that with Open Source Software is to use the Linux Terminal Server Project (LTSP) Software.

In their own words "LTSP is an add-on package for Linux that allows you to connect lots of low-powered thin-client terminals to a Linux server. Applications typically run on the server, and accept input and display their output on the thin-client display

10x Desktop computers can use up to 1000watts (100 watts each)

1x LTSP server & 10 thin clients can use less than 500 watts.

One report shows that 12 clients + server consumed less than 480 watts

More technical details on a LTSP set up

On a Ubuntu box: $sudo apt-get install ltsp-manager ltsp-server-standalone

Recycling facts[edit | edit source]

Queens Green IT[edit | edit source]

The Queen's Applied Sustainability Research Group and the Webster Group of Queen's University are collaborating on a project to improve the energy efficiency of IT/S.

Notes and references[edit | edit source]

  1. San Murugesan, "Harnessing Green IT: Principles and Practices," IEEE IT Professional, January-February 2008, pp 24-33.

Other companies use the internet to facilitate direct sale of computers for re use by a second user, for example, and This results from the rapid turnover of technology development where items are replaced by newer technology before they reach the end of their useful lives.

See also[edit | edit source]

External links[edit | edit source]

Page data
Type Draft
Keywords energy conservation, information technology, energy, energy efficiency
Aliases Green IT
Authors Chris Watkins, Sam uk
Published 2009
License CC-BY-SA-4.0
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