Today, I signed a couple petitions for Environment Mass for submission to the EPA. The first is to prevent a rollback of 2016 regulations that would have phased out the use of hydrofluorocarbons as refrigerants due to their potent climate-changing effects. The regulations were an outgrowth of the global Kigali amendment to the Montreal protocol. But this EPA is attempting to pull out of the agreement. The second addresses the rollback of regulations on automobile emissions.