ACT | The Alliance for Climate Transition | 7,695 followers on LinkedIn. Formerly NECEC, ACT is the premier voice of businesses building a world-class clean energy hub in the Northeast. | ACT leads the just, equitable and rapid transition to a clean energy future and diverse climate economy. ACT is the Alliance for Climate Transition and ACT Institute. ACT helps clean energy companies start, scale and succeed with our unique business, innovation and policy leadership.