A NOTE FROM THE EDITOR When Yale E360 launched in 2008, it was a pioneer in online environmental journalism, filling a critical gap in coverage. As he prepares to step down, founding editor Roger Cohn reflects on his years at e360 , his debt to the writers he’s worked with, and his hopes for the future. Nineteen years ago this spring, I came to what was then called the Yale School of Forestry & Environmental Studies to create an online magazine that would focus on global environmental issues. At the end of this month, I’ll be departing Yale Environment 360 , proud of the respected, influential publication we’ve built, confident in the future of its journalism, and ready to embark on my own new adventures.  At the time we launched Yale Environment 360 , there was a paucity of environmental journalism, as media outlets were cutting back on their coverage amid difficult financial times.…