Did it actually say it will DOUBLE the CO2 concentration?
Definitely past the point of no return. I guess us millennials WILL actually see the worst climate change outcomes WELL within our lifetimes...
So, until somebody brings out 10+ aircraft carriers and enforces global climate accord, i don't see any progress happening here.
We can certainly, even without genetic engineering breed crops more suited for shorter growing time frames.
There are a lot of corn hybrids, some mature fast, others far slower. Some require more sun, others less. For example, some of the faster growing varieties only take 60 days to mature, others 100+. But here's the thing. Those are 60 "good weather" days. As in not too much cloud, not too unseasonably cold or warm, reasonable amounts of rain and water, and so on.
As corn takes time to grow and mature, it doesn't matter how much sun you throw at it, it still only grows so fast. Up North, even if it's warmer, you still need enough sun too. Compressing the sun around the summer solstice doesn't help. Giving it 22 hour long days of sun doesn't just magically make the corn grow 2x as fast as an area with 11 hours of usable sun.
And the spring is still "rainy season". Some crops can't take too much rain.
Where I live, a local farmer grows traditional yellow corn, as some prefer it over newer, 'peaches and cream' hybrids. But some years? It just doesn't mature. Too much cloud, or other inclement weather (too hot, too cool, to much sun, etc) and being further north means there is little wiggle room in the growing season.
I guess my point is, Northern areas will require only certain crops. That's fine of course, and it will indeed feed people, but some crops won't be on the table.
One thing that may have already helped Russia, is the extensive work the Soviets put into breeding crops to grow further north:
https://solar.lowtechmagazine.com/2020/04/fruit-trenches-cul...
While I do not doubt the weather is more mild in Russia these days, it's also quite erratic. At least it is here in Canada. Some winters mild, then bam a winter of "old". So I wonder if the above breeds have given Russia a leg up on taking advantage?
If we look at the enforcement and outcomes of former climate action „plans“ this is unfortunately a valid option.
We don't really know at what point that is. It's probably something we can only identify in hindsight. I find it bewildering that our approach is basically FAFO.