H. Scott Matthews

The January GreenPiece debut column contained a sidebar featuring a few suggested websites for learning more about green initiatives. A recent visit to two of the sites uncovered information addressing carbon emissions and green designing—both noteworthy issues. Carbon Emissions’ Calculated Risks Researchers at Pittsburgh-based Carnegie Mellon University’s Green Design Institute posted an article on the Printers’ National Environmental Assistance Center (www.pneac.org), calling for more stringent measures for calculating global warming-causing carbon emissions. An edited version of the article is reprinted here with permission. There is no universally accepted way of calculating carbon footprint. Many accepted frameworks rely on “tiers” of increasingly