The European Union’s plans to hit net-zero emissions by 2050 were condemned as “surrender” in the climate fight and “nowhere near enough” by a high-profile list of activists and celebrities including Greta Thunberg and Leonardo Di Caprio.

They were among a lengthy list of signatories to a call for the bloc to start treating the climate issue “like an emergency”, claiming its current approach falls well short in key areas, including being based on a carbon budget “that only gives a 50% chance of limiting the global heating below 1.5