The climate between socialist Alexandria Ocasio-Cortez and environmental activists is heating up.

Green Peace founder Patrick Moore took to Twitter on Saturday to blast Cortez’s defense of using planes in the world “as it is”.

“Living in the world as it is isn’t an argument against working towards a better future,” Cortez responded to criticisms that she enjoys the luxuries of a capitalist society.

Moore opened fire.

“The ‘world as it is’ has the option of taking the subway rather than a taxi,” he tweeted in response.

“Option of Amtrak rather than plane, option of opening windows rather than A/C. You’re just a garden-variety hypocrite like the others. And you have ZERO expertise at any of the things you pretend to know,” he wrote.

Moore was harsh to Cortez several days ago, as well.

Cortez had lashed out at critics of the Green New Deal, demanding that if they don’t like her plan, they should “come up with your own ambitious, on-scale proposal to address the global climate crisis.”

She went on to dismiss them, adding, “Until then, we’re in charge – and you’re just shouting from the cheap seats.

“Pompous little twit,” Moore responded.

“You don’t have a plan to grow food for 8 billion people without fossil fuels, or get the food into the cities. Horses? If fossil fuels were banned every tree in the world would be cut down for fuel for cooking and heating,” he wrote.

“You would bring about mass death.”

Moore’s Twitter bio says he backs “science and logic, not sensation and fear.”