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Greta Thunberg has made a surprise appearance at Glastonbury, to warn of the dangers of Climate Change .

The Earth 's biosphere is " not just changing, it is destabilising, it is breaking down, " the 19-year-old told festival-goers from The Pyramid Stage.

She criticised world leaders for " creating loopholes" to protect firms whose emissions cause Climate Change .

" That is a moral decision. . That will put the entire living planet at risk" she added.

But she ended on a message of hope, telling festival-goers they had The Power to make a difference.

" We Are capable of The Most incredible things, " She Said . " Once We Are given the full story… we will know what to do. There is Still Time to choose a new path, to step back from the cliff.

" Instead of looking For Hope , start creating That hope yourself.

" Make no mistake, no-one else is going to do this for us, " she concluded. " Right here and now is where we stand our ground. "

Thunberg was introduced On Stage by Glastonbury organiser Emily Eavis , who called her " The Most inspirational speaker of her generation. "

The Activist spoke against a backdrop of the " warming stripes" a vivid illustration of how the average global temperature has soared in recent decades.

Her appearance was warmly received by The Crowd , who joined her in a chant of " climate justice" at The End of her speech.

Thunberg's speech comes three years after.

The broadcaster thanked festival-goers for cutting their plastic use, after organisers banned single-use plastic bottles.

Thunberg spoke after an invigorating performance from rapper Aj Tracey , who opened his set with a powerful, angry message about the Grenfell Tower disaster.

In a pre-recorded video, The West London musician accused those responsible for The Fire of " hiding behind a legal framework" while young black men were being " arrested and convicted Every Day with haste for acts a lot less significant".

" The worst thing of the whole situation is [That ] Grenfell could happen again, " he continued.

" Our buildings are not safe and thousands of low-income people, people who grew up just like I did, go to bed every night not knowing if it'll be their last. They tuck their children in at night and don't know if they'll wake up In Flames . "

Tracey, who grew up in Ladbroke Grove, knows many of The Victims , survivors and bereaved.

He ended his message by addressing the Prime Minister directly.

" Boris Johnson , I want to ask you A Question : 72 of Our Friends and family are dead and there's been zero arrests, " He Said . " Why? "

The rapper went on to perform a muscular set of hip-hop, grime and 2-step, rearranging many of his songs to work with a live band.

" I'm hoping That The Crowd are receptive to me trying to give them a different take on my usual set, " he told Bbc News ahead of The Performance .

He Said his musical versatility came from his upbringing.

" My dad used to be a rapper, my mum used to be a Dj On the radio, playing jungle, house, Garage . . so I've got quite a mix.

" My mum's Welsh and my dad's from Trinidad - so the British Sounds and The Caribbean sounds come into one, and I've been inspired by it. "

The Star brought His Mother to Glastonbury and she watched his show from the side of The Pyramid stage.

" She's going to be rocking out, man. She's my biggest fan, " He Said .

" She doesn't have a scrapbook but she's a photographer so she takes loads of personal pictures and has her own little personal archive. "

Paul Mccartney will headline The Festival later on Saturday Night , and is scheduled to play a marathon two-and-three-quarter hour set.

Fans arrived at the barriers in front of The Pyramid stage early on Saturday Morning to make sure they had a Front Row seat for The Show .

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Source of news: bbc.com