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Environment

Papermaking By-Product Is ‘Green’

June 8, 2015 | APPEARED IN VOLUME 93, ISSUE 23

March 16, page 23: The Government & Policy Concentrate “Wind and Solar Grow As U.S. Energy Sources” erred in using mega- watts (MW) when correct usage should have been megawatt-hours (MWh).

I respectfully suggest that you find a name for the by-product from wood pulping other than “papermaking waste” (C&EN, March 30, page 17). Such “waste” has provided a green, renewable fuel for paper mills for many decades, long before the terms were ever invented, making paper mills largely self-sufficient. Kraft black liquor is no more a waste from trees than natural gas is a waste from oil pumping.

Nelson Lawson
Savannah, Ga.

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