Ocasio-Cortez outlined plans to transition the United States to a 100 percent renewable energy system by 2035. It’s a goal hailed by environmentalists as the last best hope of staving off the most catastrophic effects of human-caused planetary warming, and it’s one already adopted by a coalition of mayors representing 42 percent of U.S. electricity use and representing major cities such as Atlanta and St. Louis.

What sets Ocasio-Cortez’s proposal apart is her plan to meet the target by implementing what she called a “Green New Deal,” a federal plan to spur “the investment of trillions of dollars and the creation of millions of high-wage jobs.” Though the slogan harks back to President Franklin D. Roosevelt’s 1930s New Deal program of infrastructure spending and labor reforms, she compared the program she envisions to the tens of billions of dollars spent on armaments manufacturing and the rebuilding of Europe after World War II.

“The Green New Deal we are proposing will be similar in scale to the mobilization efforts seen in World War II or the Marshall Plan,” she told HuffPost by email last week. “We must again invest in the development, manufacturing, deployment, and distribution of energy, but this time green energy.”