Former Vice President Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE is trailing most of his Democratic presidential competitors in a newly released ranking of climate records.

Biden tied for last place with former Colorado Gov. John Hickenlooper John HickenlooperCook Political Report shifts Colorado Senate race toward Democrat Willie Nelson playing at virtual fundraiser for Hickenlooper Gardner on court vacancy: Country needs to mourn Ginsburg 'before the politics begin' MORE (D) and Rep. Tim Ryan Timothy (Tim) RyanNow's the time to make 'Social Emotional Learning' a national priority Mourners gather outside Supreme Court after passing of Ruth Bader Ginsburg Lincoln Project hits Trump for criticizing Goodyear, 'an American company' MORE (D-Ohio) with a grade of D-minus, putting him behind other White House hopefuls such as Sens. Kamala Harris Kamala HarrisHarris faces pivotal moment with Supreme Court battle Nearly 40 Democratic senators call for climate change questions in debates Joe Biden has long forgotten North Carolina: Today's visit is too late MORE (Calif.), Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (N.J.) and Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (Mass.).

The rankings, released by Greenpeace on Thursday, took into consideration factors such as statements, legislative records, published plans and responses to a survey. The report card looked at the 19 candidates who have so far qualified for the first Democratic primary debate in June.

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Washington Gov. Jay Inslee Jay Robert InsleeBarr asked prosecutors to explore charging Seattle mayor over protest zone: report Bottom line Oregon senator says Trump's blame on 'forest management' for wildfires is 'just a big and devastating lie' MORE (D) took the top position with an A-minus. Inslee is running primarily on climate action as his presidential platform.

Booker and Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) both earned grades of B-plus, putting them just behind Inslee to round out the top three spots.

Sen. Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.), who came in fourth place, said in her survey response that she would champion transitioning the U.S. to 100 percent clean energy in 10 years by 2030. Her 10-year plan would include decarbonizing buildings, the industrial sector and the transportation industry. It's the first timeline commitment from Gillibrand, who has not released a comprehensive climate plan.

Grades were largely determined by a candidate's commitment to reject campaign donations from the fossil fuel industry, embrace the progressive climate action plan known as the Green New Deal, and timelines for seeking to transition the U.S. to a renewable electric grid.

Greenpeace does not endorse candidates.

President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE and his lone GOP challenger, former Massachusetts Gov. Bill Weld William (Bill) WeldRalph Gants, chief justice of Massachusetts supreme court, dies at 65 The Hill's Campaign Report: Biden visits Kenosha | Trump's double-voting suggestion draws fire | Facebook clamps down on election ads Biden picks up endorsements from nearly 100 Republicans MORE (R), both received failing grades.

Biden, who has consistently topped his Democratic competitors in the polls, has worried environmentalists for not being as outspoken on climate issues. Biden has not endorsed the Green New Deal nor pledged to reject fossil fuel money.