Untrue. Look at Warren's senate record compared to Sanders's. She's accomplished at least twice as much as him, and has been there half the time.
Gabbard seemed to have a'ight views on climate change, but overall just unimpressive as possible.
Alexandria Cortez and Ed Markey's Green New Deal proposal set 2030 as the goal for energy transition in America, and according to statements and pledges, that's the goal of four presidential candidates' climate plans. The first question is: are these plans representing policy goals that will be achievable over the next 10 years? Or is it more like the annual smoke and mirrors presented at UN climate conferences....such as many western leaders...including Justin Trudeau of Canada calling for a 1.5 degree C limit in future global temperature increases and then doing the exact opposite - facilitating more tarsands extraction and pipelines to move it to market!!
And no greennewdealers in the presidential race are talking about anything beyond energy transition. So let's imagine Warren is actually able to pull the $3 Trillion out of some bodily orifice to get Congress to sign on to a 3 trillion energy transition in the American economy; what about the rest of the carbon problem? It hasn't been nailed down specifically because of difficulties tracking sources, but we do know that somewhere between 30% and 50% of annual carbon emissions are coming from commercial agriculture - from monocropping wheat and other grains used primarily for factory farming meat production.
It's one thing to take on the oil&gas billionaires and their media toadies. But Algore started doing this when he turned into Mr. Green after his failed presidential run in 2000 already. Gore's plan was simply Green Capitalism. Line up major billionaire investors who were looking for new opportunities in high tech solar, wind and new high-storage batteries. Subsidize them instead of oil, gas and coal and reap the financial and environmental benefits of energy transition to a new economy, with a new cast of billionaires.
But, the old economy billionaires fought back...mostly through the Republican Party...their natural home, but how far will any candidate get if they push for a transition in agriculture like AOC's green plan included, and get swamped with all of the propaganda and money lined up aganst them that their fighting against "cow farts?" And totally ignoring the carbon footprint of big ag meat production. But, I can't help notice that none of the presidential greennewdealers have been williing to pick up that baton.
And, when it comes to "where will three trillion dollars come from?" Will Warren, Sanders or any others take on the huge and growing Military Industrial Complex to cut down for sources of funding? Tulsi Gabbard...active duty service member or not, has been the only one to go after the military branches and their wars....and that's why the Democratic Party and allied media wags have run a campaign to keep her name out of the news as much as possible...unless it's to throw up baseless attacks connecting her with Assad or President Modi of India. Something that assholes like Wolf Blitzer would never ask any other Democrat candidates about.
The MIC also likely has America's largest carbon footprint also! So, if there weren't financial reasons to pare down the size of the Military, the environmental costs of the USA's 800 to 1000 military bases, military exercises and carrier fleets sailing around the world, sure as hell would be a good reason, and one which other nations, especially those hosting US Forces are well aware of. But, you won't hear a word about this on those useless wastes of oxygen also known as the debates. Out of fear of the evil and ruthless players who work behind and in the background of elected government, and the billions of dollars at stake weapons contractors have to keep supplying guns, bombs, ships and airplanes for US services and to sell to dubious "allies" abroad. So, I'll go back to ignoring the rest of the Campaign to run one of them against Trump. Which, if Trump doesnt' self-destruct real soon, will be a lost cause and just be the usual tepid opposition for Trump forces to tee off against for the 2nd term of the Trump presidency. Just sayin, you better hope he doesn't try to repeal any amendments blocking him from more terms in the White House, or he'll try to be president for life!