Interview: “It is time to implement the Paris Agreement. If we are not ambitious enough, we will reach 3 to 5°C warming by the end of this century, not 1.5 to 3°C, which was the target,” leading climate change expert Petteri Taalas warns.

It’s now or never. We need to start acting today. We have an open window to set ambitions and start implementing the necessary solutions to mitigate accelerating climate change. But the window is rapidl...

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