Understanding the need to reduce the IT carbon footprint

Tom Worthington FACS HLM

ACS Green ICT Special Interest Group Convenor, Australian Computer Society

For Green IT

Sydney, 6 December 2007

A study sponsored by the Australian Computer Society has shown that computers and telecommunications equipment in Australia generated 7.94Mt of carbon dioxide in 2005, 1.52% of national emissions. The ACS issued a Policy Statement for Green ICT, which includes suggestions on initiatives ICT professionals, government, consumers and ICT manufacturers can take to help reduce carbon dioxide emissions attributable to the use of ICT equipment. Tom Worthington, chair of the ACS Green IT Group, will talk about practical steps which can be taken.


Comparing IT emissions and other industries

... ICT use by Australian Businesses generated 7.94Mt of carbon dioxide in 2005, equivalent to 1.52% of total national carbon dioxide emissions ... comparable in size to ... civil aviation ... 0.97% ...metal production ... 2.3% ... cement industry ... 1%. ...

From: ACS reveals ICT's Carbon Footprint, Media release, 16 August 2007

Quantifying IT emissions

This audit uses a base set of power consumption figures to calculate the demand/usage by each business. These base figures (per device) are then multiplied by the numbers of employees who use ICT equipment (for desktop/workstation computer contribution), server and LAN configuration (for computer network contribution), and telephone handset numbers (for office telephone system contribution) ... Workstation/Personal Computer 300 Watt full power 85 W standby ... Computer Monitor 75 W 5W ... High Performance Server 425 W ...

From: Audit of Carbon Emissions resulting from ICT usage by Australian Business, ACS, 16 August 2007

Within an organisation

... office equipment accounts for 7-20% of all commercial sector electricity use ...

From: Energy Star - Office equipment, Australian Greenhouse Office, 2005

Global IT emissions

No study has been done of global IT emissions.

Green credentials in the buying decision: regulations

Australian and New Zealand energy efficiency regulators are proposing to recommend mandating energy performance standards from not earlier than October 2009, or more than 3 years after they were first adopted as Energy Star levels. ...

From: Steering Committee for Computers and Monitors, Equipment Energy Efficiency Team, Australian Greenhouse Office, 5 September 2007 (quoted by Tom Worthington)

Impact of ignoring green

Organisations without Green ICT will have increased costs and fewer markets.

The ACS recommended for Green ICT:

  1. Extending the Energy Rating System to ICT equipment for domestic and commercial use
  2. Innovative technologies to reduce power consumption
  3. Carbon offsets to help offset the emissions being produced by ICT equipment used in the office
  4. Virtualisation to replace servers
  5. Disable screen savers and implement ‘sleep mode’ for inactive equipment.


Action at Every Level

Professionals on Green Issues

The ICT Environmental Sustainability Group ("Green ICT") brings together professionals interested in balancing economic and environmental aspects of information technology and telecommunications. It is a special interest group of the Australian Computer Society. The group aims to hold joint meetings with other professional bodies interested in technology, the environment and sustainability.

Thin Client Low Power Computers

Zonbu miniature PC

Thin Client Linux Computer for Consumers

Zonbu , are offering a thin client Linux computer for $US249.00. They include a data storage service and the application software in the price. If you pay for more online storage on a long term plan the cost of the hardware is lower.

The hardware is a small PC (apparently made by MSTI and sold as the "eBox mini Green PC"):

  • 1.2 GHz Via Eden CPU (C7 Esther core)
  • VIA CX700M chipset
  • 512 MB RAM
  • Ethernet 10/100 Mbit/s
  • PS/2 keyboard and mouse ports, VGA display port and 6 USB 2.0 ports
  • 4 GB CompactFlash local storage
  • Graphics up to 2048 x 1536 with 16 million colors – hardware graphics and MPEG2 acceleration
From: Zonbu, Wikipedia, 2007

In effect, the computer is sold in a similar way to a mobile phone plan: the more you pay for the monthly service and the longer you commit to the cheaper the hardware is. The service comes with OpenOffice.com and other typical Linux desktop software. A broadband Internet connection for the unit to be usable. This might be a good option for some home users and micro businesses. The business could simply plug the computer in and use it: if it breaks, then get another one, with the data stored on the remote on the server.

Larger businesses and government agencies could use the same hardware, but supplying their own servers for data and backup. Companies which use electronic document management systems could use those systems to store corporate documents created by the client computers.

Carbon Neutral Computers?



Zonbu claim carbon neutral computer:

With Zonbu, green doesn't have to make you blue! With its efficient ultra low power design, Zonbu delivers the power of a traditional desktop computer but uses just a fraction of the energy. That could mean as much as $10 a month in energy savings for you — and might just help save the planet, too. Not only does Zonbu's low power design reduce CO2 emissions, but by buying carbon offsets, we make the operation of your Zonbu device completely carbon neutral. Talk about guilt-free computing!

From: Good things come in small boxes, Zonbu, 2007

Via claim Carbon Free Computing:

VIA Carbon Free Computing addresses this issue head on, aimed at offering the world's first line of PC products certified Carbon Free. VIA works with environmental experts to calculate the electricity used by an average Carbon Free Computing product over its lifetime (assumed to be 3 years). Then from the amount of electricity used, VIA calculates how much carbon dioxide emissions will be released into the environment mainly as a result of fossil fuel burning power plants, and then works with regional offset organizations to "offset" that amount of carbon dioxide through projects such as: * Reforestation ... Alternative Energy ... Energy conservation ...

From: VIA Carbon Free Computing - Breathe Easier!,VIA, 2007

Thin Clients for Business?

Thin client computers can offer benefits beyond environmental ones. As an example thin clients can replace desktop PCs for those workers only needing standard office applications. The thin client can also replace a digital telephone. Corporate applications, such as payroll and finance can be provided to the desktop using the web browser and interactive web applications, such as AJAX. Corporate documents can be retained in central file servers and Electronic Document Management Systems. This removes the need to maintain as much software on the desktop and increases the security of corporate data.

Servers can be consolidated into efficient and easier to manage data centers. These can take advantage of low power disks, processors and green power.

More Information

Slides for these notes are also available.

Copyright © 2007 Tom Worthington

Creative Commons License
This work by Tom Worthington is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 2.5 Australia License.

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