In March 2011, the EPA proposed regulations that would require power plants to install pollution-control technologies to reduce emissions of mercury, arsenic, chromium, nickel and acid gases.
Noong Marso 2011, ang EPA iminungkahing regulasyon na nangangailangan ng mga halaman kapangyarihan upang i-install teknolohiya polusyon-control upang mabawasan ang emissions ng mercury, arsenic, kromo, nikelado at acid gases.