The DOT and EPA jointly established new federal rules setting the first-ever national greenhouse gas emissions standards and fuel economy standards for new cars and light trucks under the Corporate Average Fuel Economy program and Clean Air Act for 2012 through 2016 model-year vehicles. The rules together require automakers to improve fleet-wide fuel economy and reduce fleet-wide greenhouse gas emissions by 5 percent every year. The administration expects automobile manufacturers to meet these standards by adopting technologies already in commercial use. It also expects some manufacturers to pursue more advanced fuel-saving technologies, such as hybrid vehicles, clean diesel engines, plug-in hybrid electric vehicles, and electric vehicles.