The Massachusetts Supreme Judicial Court’s recent Kain decision placed the Baker Administration on notice: The Commonwealth must establish regulations that will ensure the annual emission reductions needed to keep its 2020 greenhouse gas emissions below 70.8 million metric tons of CO2-equivalent. With only 52 months left to achieve this Global Warming Solutions Act target, Massachusetts will need quick action from its Office of Energy and Environmental Affairs, along with strong collaboration from legislators, environmental advocates, utilities, and local governments.