EcoWatch: Neil Young has long been known for his involvement in environmental and social justice issues. Now Young has extended his longtime activism to another area: taking on Starbucks and its association with the anti-GMO labeling Grocery Manufacturers Association (GMA). The GMA has spent heavily in states where GMO labeling has been on the ballot, working to defeat it, usually coming in just behind Monsanto in the size of its donations. Goodbye Starbucks! Young announces on his website. I used to...