Democratic presidential hopefuls Joe Biden and Elizabeth Warren on Tuesday unveiled their ambitious plans to fight climate change and transform America’s economy to focus on renewable energy.

The former veep warned that “we must take drastic action now to address the climate disaster facing the nation and our world,” and called for “a Clean Energy Revolution to confront this crisis and do what America does best — solve big problems with big ideas,” Fox News reported.

The proposal — called “The Biden Plan for a Clean Energy Revolution & Environmental Justice” — would cost $1.7 trillion over the next 10 years, Biden estimated.

His campaign said the plan would be partially paid for by more than $5 trillion in additional private sector and state and local investments.

This is considerably less expensive than the Green New Deal championed by progressives like New York Rep. Alexandria Ocasio-Cortez, which would cost as much as $93 trillion, according to critics.

Biden, in a statement announcing the plan, stressed that “more severe storms and droughts, rising sea levels, warming temperatures, shrinking snow cover and ice sheets — it’s already happening. We must take drastic action now to address the climate disaster facing the nation and our world.”

And he warned that “science tells us that how we act or fail to act in the next 12 years will determine the very livability of our planet.”

The Biden campaign said his plan would ensure that the US achieves a 100 percent clean energy economy and reaches net-zero emission no later than 2050.

The campaign also said that Biden would recommit the US to the Paris Agreements on climate change — reversing Trump’s pullout — but would also “rally the rest of the world to meet the threat of climate change.”

And Biden, long a friend to organized labor, would vow “not to leave any workers or communities left behind” as the nation transformed to a clean energy economy.

Warren, meanwhile, proposed spending $2 trillion on a new “green manufacturing” program that would invest in research and exporting American clean energy technology.

The manufacturing program is the first in a new series of “economic patriotism” proposals Warren is unveiling intended to create American jobs and help US industry.

“Like we have before, we should bank on American ingenuity and American workers to lead the global effort to face down this threat,” Warren, referring to climate change, wrote in a post on the website Medium.

Among the more than 20 Democrats in the field hoping to challenge Republican President Trump in November 2020, Warren has distinguished herself by proposing the most policy initiatives, though Biden remains the frontrunner.

The newest proposal from the Massachusetts senator outlines how she would carry out some of the policy goals outlined in the Green New Deal, which has the backing of liberal members of her party.

The roll-out coincides with a campaign trip by Warren to Michigan, a Midwestern state with a large manufacturing sector that shocked political observers in 2016 when voters backed Trump and helped propel him to the White House.

The plan is likely to draw criticism from opponents who will argue the price tag is too high and that trying to quickly overhaul the US energy sector would have crippling economic effects.

The first part of Warren’s plan calls for spending $400 billion over 10 years on clean energy research and development.

Next, Warren proposed increasing the amount the United States spends on “American-made clean, renewable, and emission-free energy products for federal, state, and local use, and for export.”

Warren said the US currently spends $1.5 trillion on defense procurement, which she called “bloated,” and argued that an equal amount should be spent on clean energy.

As part of this proposal, Warren would require companies selling to the federal government pay their employees at least $15 an hour, that employees receive 12 weeks paid family and medical leave and be able to form unions.

Labor practices were also included in Green New Deal proposals.

With Reuters