By Bill Walczak, Reporter Columnist April 22, 2021 Debris litters fenced-off space near Expressway. Bill Walczak photo Last week’s column about the lack of maintenance of the state’s property alongside the Southeast Expressway and the MBTA tracks received quite a response. The trash and graffiti were certainly noticed by residents, and there were calls by readers to organize clean ups and also to demand that the state maintain its property. The most intriguing response came from Savin Hill’s Liz MacNeil. “I have been thinking trees,” she said. “The noise and pollution of the expressway, commuter trains, and Red Line have helped steer my thoughts that way. At the moment, we seem to be moving backwards. Trees are being sacrificed to new construction, and new ones, even if/when they are being planted, can’t compensate for the carbon removal, pollution reduction, and summer cooling effects of the mature trees they replace.