So much for being eco-friendly.

Attendees at Britain’s five-day Glastonbury Festival — which ran on a theme of climate change and the environment — left behind thousands of plastic bottles and trash, photos of the aftermath show.

Environmentalists like Sir David Attenborough praised organizers of the music fest in Somerset for going “plastic free” by banning the sale of single-use plastic bottles this year.

“That is more than a million bottles of water that have not been drunk by you. Thank you. Thank you,” Attenborough, 93, said to cheers and applause on Sunday, the last day of the festival.

Glastonbury co-organizer Emily Eavis, meanwhile, said the “most eye-opening part of the weekend for me was not seeing any plastic bottles in the bins or on the ground,” according to the BBC.

But post-festival photos told a different story — showing masses of plastic bottles and garbage strewn all over the 900-acre grounds.

Still, the on-site recycling team said it has seen “a massive reduction in the amount of plastic on the site this year — the least ever seen, by a distance,” the BBC reported.

When Glastonbury was last held in 2017, more than 1 million drinks in plastic bottles were sold. This year, there were zero, The Sun reported.

There were more than 850 water refill stations at the festival, according to reports, which noted long lines to fill up.

Festival officials said there was never a ban on the public bringing their own plastic bottles and added that all plastic and cans left behind will be recycled, according to the BBC.

“We feel that the public very much bought into our campaign to reduce, reuse and recycle and we’re very pleased with the results,” a festival spokesperson told the news site.

With Post wires