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Please don't take HN threads into classic flamewars. Nothing good is going to come of it, only repetition. Repetition is the enemy of curiosity.
> It's actually a good thing that CO2 is rising
Not really good for us or for a stable climate, but probably good for plants. Plants love CO2
> We are in a cooling period, which means we need all the help we can get growing food.
We might have some cold winters, but global average temperatures are going up, a lot. Globally we are in no danger of not being able to grow food due to cold temperatures (though local effects from disrupting ocean currents are still very possible ofc).