Swedish climate activist Greta Thunberg slammed world leaders attending the G7 summit, after pictures of a "steak-and-lobster-BBQ-celebration" were shared online.

Taking to Twitter on June 13, 18-year-old Thunberg called-out those present for failing to take the "climate and ecological crisis" seriously.

"G7 spends fantasy amounts on fossil fuels as CO2 emissions are forecast for 2nd biggest annual rise ever," wrote Thunberg on Sunday. "This calls for steak-and-lobster-BBQ-celebration while jet planes perform aerobatics in the sky above the G7 resort!"

In a follow-up tweet, she added, "The G7 leaders really seem to be having a good time presenting their empty climate commitments and repeating old unfulfilled promises."

Her tweet came just hours after photos from one of the final G7 summit events were shared online by U.K. Prime Minister Boris Johnson.

The images show world leaders like Prime Minister Justin Trudeau, French President Emmanuel Macron and U.S. President Joe Biden enjoying drinks, a barbeque and a performance by the Red Arrows jet planes.

Johnson was also criticized for taking a flight to the event in England, when he could have taken a train or car, particularly as climate change was one of the key topics set to be discussed during the summit.

Greta Thunberg VS world leaders

It's not the first time the Swedish teen has been happy to take on presidents and prime ministers.

When Thunberg visited Canada back in 2019, she delivered a speech in Vancouver and took aim at world leaders specifically.

"They are so afraid of being unpopular and for making uncomfortable decisions," she said at the time. "It's like they are selling our futures for their comfort and profit. And yet, they have the nerve to look us in the eyes and say that they are doing enough."

She's also blasted Justin Trudeau for "not doing enough" when it comes to tackling the climate crisis, to which the Canadian PM responded, "I'm listening."