Also, acidification is another problem of co2. Honestly you might rather release methane or refrigerant if your goal was only to heat/insulate the atmosphere with minimal changes to chemistry, but I'm not a chemist etc
Also never forget the great oxygenation event and the azola cooling the planet to the point of mass extinction and snowball earth
(That said, if we make it past the next century, we're probably going to be disassembling entire planets with von Neumann replicators rather than concerning ourselves with something as small as a mere atmosphere).
'those scientists' were from Sweden responding to protests over the increasing costs of food due to famine. When looked at from the lens of maximizing calories per dollar, it makes a lot more sense.
I'd guess that there are more people use that information to select lower calorie food than people who make their menu selections based on the maximum number of calories per dollar, although I'd bet both those groups are a tiny fraction compared to the number of people who just order whatever they're in the mood for/tastes best to them and knowing how many calories are in that meal doesn't influence their behavior/choices at that moment but may still inform their choices later on