Energy efficiency is becoming more important to supercomputers, as ever more powerful machines consume ever more energy. Japan and the United States lead energy-efficient supercomputing. (A liquid immersion ExaScaler module of the top machine - Shoubu system B - is pictured to the left.)

We've show how, in my locality, America's approach to consumer e-waste provides dis-incentives to rural residents. This post shows the same dynamic at play with university students. But the city did temporarily remove one barrier during a flood.

We haven't updated this post in a while, so thought it would be a good opportunity to look at new mega-facilities. The latest addition is the Linkedin facility in Oregon USA.

Government entities have an important role to play in encouraging sustainable ICT across all industries. Effective leadership requires internal implementation, as well. The tag at the top of this post - 'government' - helps you easily locate posts containing opportunities for and applications of Green ICT in government operations. (Green ICT in public education is found through the 'education' tag.) We note briefer items in this post, but haven't updated it recently. An email from TCO Certified reminded us that municipalities continue to pursue Green ICT purchasing.

Liquid cooling was once a staple of large-scale computing, but has largely been replaced by air cooling. We identified several efforts to bring liquid cooling to the server world in our first version of this post in 2012 and have seen continuous progress since. Here is the latest news.

The Australian Government ICT Sustainability Plan 2010-2015 covers a wide range of Green ICT practices and should be considered by other government entities looking to adopt Green ICT practices. We will periodically look at various elements of the Australia's plan - first up are the six components of its ICT equipment procurement plan.

We've covered technology to reduce paper use when printing. What about reducing ink use? A high school student's study found that his school could save $21,000/year by switching typefaces...and the United States government could save $234 million!

Hong Kong's Green ICT Awards started in 2011, making them the oldest ongoing Green ICT recognition program* in the Asia-Pacific region. The roster annual winners illustrate the diverse nature of the area's ICT-savvy users and their Green ICT practices.

The NCAR-Wyoming Supercomputing Center (NWSC) in Wyoming "provides advanced computing services to scientists studying a broad range of disciplines, including weather, climate, oceanography, air pollution, space weather, computational science, energy production, and carbon sequestration. It also houses a landmark data storage and archival facility that will hold, among other scientific data, unique historical climate records." It has also become of the focus our largest Twitter discussion of the 2013.

City governments can show Green ICT leadership. Paul Kronberger, CIO of Madison (WI-USA), a city of 270,000 residents, tells me the municipality has taken these steps to improve the sustainability of its own operations.