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.

9 Ways Companies Can Start to Repay Their Natural Debt
Twenty-four powerful companies, who have collectively generated more than $500 billion in annual revenue, are taking proactive steps to repay their debt to the planet.  This article highlights the nine ways companies can take on the task of repaying their natural debt:

IBM ‘Hot Water Cooling’ Saves 40% of Supercomputer Emissions
The Leibniz Supercomputing Centre (LRZ) and IBM have announced the world's first commercially available hot-water cooled supercomputer. The hot-water cooling technology invented by IBM allows the system to be built 10 times more compact and substantially improve its peak performance while consuming 40% less energy than a comparable air-cooled machine.

U.K. to Mandate CO2 Reporting for Largest Corporations
The U.K. government confirmed that it will introduce mandatory carbon reporting rules requiring around 1,800 of the country’s largest corporations to report annually on their green emissions.  The U.K. government is hoping that their introduction of the world’s first mandatory requirement for emissions reporting will trigger other countries to adapt similar rules.

eBay to Power Utah Data Center With Renewable Fuel Cells
eBay announced that they plan to use 30 biogas fuel cells as the only power source for its new facility in Utah.  The new facility is set to go online in the middle of 2013 and will represent the latest efforts by eBay to embrace renewable energy to power its facilities. Currently, eBay already runs a 650 kilowatt solar array and a 500 kilowatt Bloom fuel cell installation at its headquarters in San Jose, Calif., and a 100 kilowatt solar array at a data center in Denver.