Keir Starmer has been urged to show “true climate leadership” after the head of the United Nations warned the world had already surpassed its climate targets.

It was a pivotal moment in international politics when 195 countries around the globe signed up to the 2015 Paris Agreement, pledging to try and keep average global temperature changes to well below 2C compared to the industrial era.

Countries agreed “to limit the temperature increase to 1.5°C above pre-industrial levels”.

In recent years, as global warming continues, some experts say this 1.5C limit needs to apply to the end of this century to avoid triggering far more several climate changes – including extreme weather like droughts, heatwaves and rainfall.

But the UN’s secretary-general Antonio Guterres told the Guardian a

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