This week’s Green IT Roundup highlights:  Large US firms spending $2.5 billion annually on technology consulting and system integration relating to their energy and sustainability initiatives by 2015, Achieving energy efficiency without trying, U.S. Energy Department invests $7 million in three energy-efficient light projects as part of its efforts to reduce energy costs, and How schools can use less energy & spend less money, without the sacrifice.

This week’s Green IT Roundup includes: The announcement that all businesses on the Main Market of the London Stock Exchange will have to report on their levels of greenhouse gas emissions starting April 2013, The rise in U.S energy consumption forces the United States to embark on its most aggressive movement toward a sustainable future, and Companies moving beyond spreadsheets to make sustainability measures pay off.

This week’s Green IT Roundup features: 9 ways companies can be proactive and start to repay their natural debt, IBM and Leibniz Supercomputing Centre (LRZ) announce the world’s first commercially available hot-water cooled supercomputer, UK mandates CO2 reporting for its largest corporations, and eBay’s plan to power their Utah Data Center with Renewable fuel cells.

This week’s Green IT Roundup includes: The UK Technology Strategy Board launching a £25 million infrastructure competition for smarter cities, HP announcing details for an architecture for a data center that regulates no net energy from traditional power grids, and Game-playing can be a central too to help companies get their employees involved in delivering on firm-wide sustainability.

This week’s Green IT Roundup highlights: Chicago’s efforts to make it a cleaner, leaner and more sustainable city, Three ways organizations can structure and elevate their sustainability initiatives to guarantee its success, and IT abilities to create ‘intelligent efficiency’ for buildings and transportation.

This week’s Green IT Roundup features: New Boundary Technologies^® offers the industry’s 1^st pc power management savings guarantee, Report shows the U.S lags Europeans on sustainability, UN Global Compact calls for companies to make sustainable commitments, and Volkswagen commits $52 billion to going green.

This week’s Green IT Roundup features:  Genzyme’s energy-saving initiatives, which have allowed the company to reduce its energy bill by 13%, The need for IT to take a leading role in implementing sustainability initiatives, The establishment of The Young Entrepreneurs Fund to promote the development of low carbon technologies by entrepreneurs and small to medium-size firms, and The role energy efficient buildings in promoting healthier companies.

This week’s Green IT Roundup focuses on:  Celebrating Earth Days 42^nd Birthday by turning your power management on, California leading green tech funding and reducing greenhouse emissions, Walmart creeping forward on its sustainability goals, and why it’s time for industrials to step up their energy management.

This week’s Green IT Roundup highlights:  Nick Clegg unveils measures to bolster the Green Deal to cut energy bills for households and businesses in the UK, GoodGuide enables consumers to drive corporate sustainability, and Leveraging the latest advancements in technology can offer sustainable solutions.

This week’s Green IT Roundup features:  The struggle for IT admins to green light Green IT projects, Green IT practices driving cost savings in K-12 sector, and 500-plus hospitals and health care groups form a coalition to increase sustainability in the health care industry.