Probably no big deal.
Reposted from Leon Simons
The Mauno Loa observatory showed the first weekly average CO₂ concentration of >430 ppm in at least 3 million years!

Including other greenhouse gases, the CO₂-equivalent is at >560 ppm.

Which represents more than a doubling of preindustrial CO₂.

Without aerosols, this would cause ~5°C of warming

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