Substitution (image) University of Washington Caption A Northwest state or private forest, harvested regularly for 100 years, helps keep carbon dioxide out of the atmosphere year after year by storing carbon in long-term wood products (blue) and by substituting wood for fossil-fuel-intensive products like steel and cement, thus avoids carbon dioxide emissions during their manufacture (orange). The chart also shows carbon that remains in a sustainably managed and harvested forest (green and black); and an "emissions" line (cranberry) at the bottom, representing the energy to harvest and process wood, which is partly counterbalanced by the "mill residual" line (yellow) that represents mill wastes burned for energy in place of fossil fuels. Credit E Oneil/U of Washington Usage Restrictions Credit required Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.