For those wondering, one degree celsius increase means every kilogram of air has at least increased by 1°C. The specific heat of air is about 1158 J/(kg*C). Now that might not seem like a lot of energy, in fact 4g (one teaspoon) of sugar has 68,000 J of chemical energy.
The thing is, you might have noticed, there's a lot of air around us. About 5.14 x 10^(18) kg of air. So when you take a pretty normal number and multiply it by an insanely huge number, you get an insanely huge number. That's about 5 exajoules of energy. That is the total energy consumption of the US in 2021 for four million years. Or in sugar terms, equal to the energy of sugar if you converted a little over half of the Earth's entire mass into sugar.
We hit that additional amount of energy in our atmosphere in 2017.