Field Gas Sampling (IMAGE) American Society of Agronomy Caption Undergraduate student Cain Silvey checking methane concentration in a field mesocosm with swamp milkweed in Dayton, Ohio that was part of the constructed wetland research area. The blue plastic tubes protect tree seedlings that are part of a different restoration project. Credit Karla Jarecke Usage Restrictions Use with story only License Licensed content 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.