EPA Head Lisa Jackson to Step Down 0 Randall Gross EnvironmentDecember 2012Thursday, December 27, 2012 at 8:18 am PST • Views: 1,727 EPA Head Lisa Jackson to Step Down Action Clean Air Act Endangerment Finding Greenhouse Gasses Head Lisa Jackson Greenhouse Gas Emissions Supreme Court Decision Regulation Sharp Fall Obama Administration Plunge EPA Head Lisa EPA Fracking Initial EPA Oversight. Carbon Dioxide Emissions Natural Gas