Democratic presidential candidate Tom Vilsack, former governor of Iowa, unveiled his plan for energy security during a speech in San Francisco Tuesday.

According to an Associated Press report, Vilsack set out a seven-part plan for achieving his goal to “dramatically reduce energy imports and dramatically reduce carbon emissions.” That plan would include a reduction in greenhouse gases produced by the United States by 2050, principally through a mandatory “cap and trade” program among businesses and other institutions.

Vilsack would also require a reduction in carbon dioxide emissions by automobiles, more cellulosic ethanol research, and strive to make the nation’s whole transportation system “virtually petroleum-free.”