WASHINGTON (AP) — Democrats including Rep. Alexandria Ocasio-Cortez of New York are calling for a Green New Deal intended to transform the U.S. economy to combat climate change and create thousands of jobs in renewable energy.

The freshman lawmaker and veteran Sen. Ed Markey of Massachusetts are teaming up on the plan, which aims to eliminate the U.S. carbon footprint by 2030.

A joint resolution drafted by Ocasio-Cortez and Markey sets a goal to meet “100 percent of the power demand in the United States through clean, renewable and zero-emission energy sources,” including dramatic increases in wind and solar power.

A news conference at the Capitol is set for Thursday, the day they introduce the resolution.

While setting lofty goals, the plan does not explicitly call for eliminating the use of fossil fuels such as oil and natural gas, a nod to pragmatism that may disappoint some of Ocasio-Cortez’s strongest supporters.

Even so, their Green New Deal goes far beyond the Clean Power Plan proposed by President Barack Obama. President Donald Trump has scrapped Obama’s plan, which imposed emissions limits on coal-fired power plants, as a job-killer.

The Democrats are likely to meet resistance to their proposal in Congress, especially in the Republican-controlled Senate. Trump, who has expressed doubts about climate change, also is likely to oppose it.

The resolution marks the first time Ocasio-Cortez and other lawmakers have attached legislative language onto the Green New Deal, a concept that until now has been largely undefined other than as a call for urgent action to head off catastrophic climate change and create jobs.

Several Democratic presidential hopefuls have embraced the idea of a Green New Deal without saying exactly what it means.

Ocasio-Cortez said in a statement that the plan will create “unprecedented levels of prosperity and wealth for all while ensuring economic and environmental justice and security.” She calls for a “World War II-scale mobilization” that includes high-quality education and health care, clean air and water and safe, affordable housing.

Answering critics who call the plan unrealistic, Ocasio-Cortez says that when President John F. Kennedy wanted to go to the moon by the end of the 1960s, “people said it was impossible.” She also cites Franklin D. Roosevelt’s New Deal, Lyndon B. Johnson’s Great Society and the interstate highway system begun under Dwight D. Eisenhower as examples of American know-how and capability.

While focusing on renewable energy, Ocasio-Cortez said the plan would include existing nuclear power plants but block new nuclear plants. Nuclear power does not emit greenhouse gases, which contribute to global warming.

The resolution does not include a price tag, but some Republicans predict it would cost in the trillions of dollars. They denounced the plan at House hearings on climate change on Wednesday.

The Green New Deal would be paid for “the same way we paid for the original New Deal, World War II, the bank bailouts, tax cuts for the rich and decades of war — with public money appropriated by Congress,” Ocasio-Cortez said.

Government can take an equity stake in Green New Deal projects “so the public gets a return on its investment,” she said.