Three of former Vice President Joe Biden’s rivals in the Democratic presidential race took issue with his approach to combating climate change following a Friday report that he plans to pursue a “middle ground” to reduce carbon emissions. Washington Gov. Jay Inslee (D-Wash.), who has staked his candidacy on addressing climate change, was the first to explicitly argue against Biden’s approach. He issued a statement on Friday calling for “a bold climate plan for our future.” “Facing a crisis does not permit half-measures,” he said. “Half measures mean full extinction of millions of species and full economic damage to communities across America.”

ASSOCIATED PRESS/Jae C. Hong) Former Vice President Joe Biden listens to voter in Los Angeles on Wednesday. The vice president is reportedly preparing a climate plan that he believes can appeal to blue-collar Trump voters.

Sen. Bernie Sanders (I-Vt.), who polls second behind Biden in most polls on the Democratic race, also counts climate change as an area of significant disagreement with Biden. “Joe talks about a ‘middle road’ on climate change,” Sanders said on MSNBC’s “Politics Nation with Al Sharpton” on Saturday. “Well, I think climate change is an existential threat to our planet. And the scientists tells us we’ve got 12 years to aggressively transform our energy system before we have irreparable harm to our country and the planet. “We have real differences,” he added. “I like Joe, I respect Joe and I look forward to an issue-oriented campaign.” Sanders’ remarks followed a Friday afternoon tweet he posted that, without naming Biden, criticized the idea of a “middle ground” on climate change policy. Sen. Kirsten Gillibrand (D-N.Y.) also dismissed the idea of an approach to climate change that tries to split the difference between inaction and the most ambitious proposals for change. Asked by reporters after a campaign event in Warner, New Hampshire, on Saturday what she thought of Biden’s reported plans, GIllibrand replied, “I disagree.” She continued, “Global climate change is the greatest threat to humanity that exists today and we need solutions that are as bold and as urgent as the problem we actually face.” Gillibrand went on to discuss her support for the Green New Deal, a plan popular among progressives that would use massive infrastructure investments to transition the economy to entirely renewable energy within a decade. (She also supports re-entering the Paris climate accords and enacting a carbon tax.) Although former Rep. Beto O’Rourke of Texas did not specifically address Biden’s reported interest in a compromise-driven approach to reducing fossil fuel consumption, his strident tone during a speech outside a bar in Dover, New Hampshire, on Saturday also underscored the divergent strategies among the contenders for the Democratic nomination. O’Rourke opened his speech with an insistence that the threat of climate change becoming irreversible in the next decade made it necessary to “take the boldest possible positions and implement them, not by half measure, nor by half steps.” When asked what his top three priorities would be for using the power of executive orders upon entering office, O’Rourke named just one: addressing climate change. “The shot clock is winding down,” he said. “We’ve got 10 years and that’s it.”

If you look at the UN report, there’s not room really for a middle road. New Hampshire state Rep. Clyde Carson (D)