Freshman Rep. Alexandria Ocasio-Cortez unveiled a new climate change initiative on Thursday — and had it swiftly knocked down by House Speaker Nancy Pelosi.

Ocasio-Cortez and Sen. Ed Markey are promoting the 'Green New Deal' as a policy proposal as one that could become a massive vehicle for cutting carbon emissions and creating jobs in the renewable energy sector.

Pelosi told Politico in wide-ranging interview, however, that it's just a 'suggestion' and one of 'many' the caucus is likely to receive on green energy.

'The green dream or whatever they call it, nobody knows what it is, but they’re for it right?' she said, mocking the democratic socialist's effort.

On Thursday morning, Pelosi announced a new committee that she'd established. Ocasio-Cortez was noticeably missing from the list of participants.

Despite the optics, Ocasio-Cortez said at a news conference that it was 'not a snub.' She said she declined the speaker's invitation to join the panel.

Freshman Rep. Alexandria Ocasio-Cortez unveiled a new climate change initiative on Thursday — and had it swiftly knocked down by House Speaker Nancy Pelosi

Pelosi said in a wide-ranging interview, however, that it's just a 'suggestion' and one of 'many' the caucus is likely to receive on green energy. The House speaker is seen here at the National Prayer Breakfast

Neither women's offices said why, although DailyMail.com asked both for comment.

Ocasio-Cortez told reporters on Capitol Hill, as she launched the initiative with a coalition of Democrats that she already serves on the Environmental Subcommittee on Oversight and other panels that are specific to climate change.

Pelosi was the first to say that she invited the 29-year-old lawmaker to participate in the bipartisan select committee and was rebuffed.

'She did in fact invite me to be on the committee,' Ocasio-Cortez said later. 'So I don't think this is a snub. I don’t think it is anything like that.'

Pelosi and Ocasio-Cortez have frequently found themselves at odds, despite flying the same party flag, since the young congresswoman toppled longtime Democratic leader Joe Crowley in a surprise primary victory.

Ocasio-Cortez stormed Pelosi's office on Capitol Hill days after the general election with environmental activists.

She has joined in on other initiatives with Pelosi, such as a push for women in Congress to wear white during the State of the Union as a symbol of their historic victory in the last election.

More women are now serving in Congress — 102 — than at any time in history. Most of them are Democrats who won challenges over male candidates.

At the State of the Union address, Pelosi stood and clapped as Trump derided 'resistance' politics that's all about obstructing the other side rather than compromise.

Pelosi and Ocasio-Cortez were on a collision course a day later as the latter pushed her green initiative.

Ocasio-Cortez and her allies want to establish a 10-year framework for green initiatives intended to increase environmental sustainability in job-friendly way that recognizes the urgency of global warming.

'Even the solutions that we have considered big and bold are nowhere near the scale of the actual problem that climate change presents to us,' Ocasio-Cortez told NPR on Morning Edition.

She said, 'It could be part of a larger solution, but no one has actually scoped out what that larger solution would entail. And so that's really what we're trying to accomplish with the Green New Deal.'

The congresswoman who goes by her initials, AOC, said she'd be willing to get behind a 'massive government intervention' and has 'no problem saying that' to the old guard and free-market conservatives.

'We have tried their approach for 40 years. For 40 years we have tried to let the private sector take care of this. They said, "We got this, we can do this, the forces of the market are going to force us to innovate," ' she said.

'Except for the fact that there’s a little thing in economics called externalities. And what that means is that a corporation can dump pollution in the river and they don’t have to pay, but taxpayers have to pay.'

Ocasio-Cortez sheds a tear during a press conference calling on Congress to cut funding for US Immigration and Customs Enforcement (ICE) and to defund border detention facilities, outside the U.S. Capitol

Ocasio-Cortez and other female lawmakers cheer during President Donald Trump's State of the Union address in the chamber of the U.S. House of Representatives

The democratic socialist's plans have been pooh-poohed as too costly, even by lawmakers her share her goals.

She told NPR that it is a 'mistaken idea' that 'taxes pay for 100 percent of government expenditure' - the government can also use 'deficit spending and other kinds of investments, you know, bonds and so on' to fund projects.

At progressives' request, Pelosi formed a panel on Capitol Hill to study climate change initiatives like the one that AOC put forward.

But neither the New York congresswoman nor her bill's co-sponsor, Markey, are a part of it. It wasn't immediately clear why that was the case, particularly after Pelosi hailed the committee's members as 'visionary leaders and strong voices' on the issue in a release.

She said they would be 'vital in advancing ambitious progress for our planet' and each member 'brings great energy and deep expertise to the climate crisis.'

Ocasio-Cortez's plans have been pooh-poohed as too costly, even by lawmakers her share her goals

Pelosi tapped Democratic Rep. Kathy Castor of Florida to lead the select committee that has authority to call witnesses and is outfitted with a budget. Republicans will also name five representatives to the committee.

'This Committee’s strong and urgently-needed oversight and investigatory actions will be critical to the entire Congress’s work to protect our public health with clean air, clean water and public lands and uphold our sacred moral responsibility to leave a healthy, sustainable future for generations to come, while making America preeminent in green technologies with the good-paying, green jobs of the future,' Pelosi said in a press release.

The House leader, who President Trump has complained is being pulled to the left by new members of her caucus, seemed to be intentionally undermining Ocasio-Cortez's announcement of her Green New Deal.

She suggested in the Politico interview that Ocasio-Cortez and other new lawmakers with activists mindsets still need to realize that governing is not the same as running a single-issue campaign.

'The fact is, you are by definition as an advocate dissatisfied, relentless and persistent,' Pelosi said of her own transition from activist to congresswoman. 'Whatever the electeds are doing is a compromise, it’s not the purity of what we want.'