In addition to GHGs, we track and report other air emissions from our manufacturing facilities, including sulfur dioxide (SO2) and nitrogen oxides (NOX). We’re committed to reducing these emissions and strive to move beyond levels of regulatory compliance wherever possible, focusing on innovative processes, advances in technology and best management practices. International Paper has a long-standing ozone-depleting substances policy and we’re on track to phase out refrigerants, eliminating the use of R22 by 2020 as required by U.S. regulations.
Since 2006, International Paper has reduced overall air emissions from our mills worldwide. Emissions of SO2 and total reduced sulfides (TRS) per ton of production decreased 34 percent and 49 percent, respectively, while emissions of particulate matter (PM) and NOX remained relatively flat when normalized for production. The decrease in TRS is a direct result of process changes and additional infrastructure control to reduce and reclaim sulfur-containing compounds. Asset consolidation and investment in a new precipitator contributed to our 2010 PM and SO2 emissions reductions.