[londons_explore]

If we bring global CO2 back down to 280 ppm (like it was in the year 1700[1]), then a lot of today's farming methods will have substantially lower yields. Our modern crops need those higher CO2 levels to grow fast[2]. Without other ways to grow more food, people will starve.

[1]: https://www.co2levels.org/img/graph_grid.png

[2]: https://extension.okstate.edu/fact-sheets/images/greenhouse-...

[ben_w]

Greenhouses can have different CO2 levels to the outside, and it's not the only thing that has (or will) increased yield.

[teruakohatu]

Many greenhouses pump in C02. They call it CO2 enrichment.

[lisasays]

Worry not. We'll be very lucky if we ever get below 450.

[insanitybit]

source pls (edit: thanks!)

[londons_explore]

added