President Trump has made eliminating federal regulations a priority. His administration ... has often targeted environmental rules it sees as overly burdensome to the fossil fuel industry. To date, the Trump administration has sought to reverse more than 70 environmental rules, according to a New York Times analysis, based on research from Harvard Law School's Environmental Regulation Rollback Tracker, Columbia Law School's Climate Tracker and other sources. The Environmental Protection Agency has been involved in more than a third of the policy reversals. Scott Pruitt, the head of the E.P.A. who spearheaded the administration's agenda of environmental deregulation, resigned after facing a number of ethics scandals. The new acting chief of the agency is a former coal lobbyist. Rules targeted for reversal so far include ... air and water pollution controls and protections for threatened animals and habitats. The Trump administration has, in many instances, pared back these regulations in favor of more expansive energy extraction policies - often as a direct response to petitions from oil, gas and coal companies. All told, the Trump administration's environmental rollbacks could lead to at least 80,000 extra deaths per decade and cause respiratory problems for more than one million people, according to a recent analysis. That number, however, is likely to be "a major underestimate of the global public health impact," said Francesca Dominici, a professor ... at the Harvard School of Public Health.