Smoke Emissions (image) USDA Forest Service - Pacific Southwest Research Station Share Print E-Mail Caption Smoke emissions from debris piles (background) with plastic covers (not shown) were measured in burning mixtures of wood and polyethylene plastic (foreground). The addition of the plastic to the burning wood had little to no effect on trace gas and particulate emissions. Credit (U.S. Forest Service/ David Weise) Usage Restrictions None Share Print E-Mail 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.