If emissions were a big enough issue for the hosts, then they shouldn't be flying tens of thousands of tourists & atheletes to come watch some sports. AC units are a drop in the bucket.
Instead, they have a cooling system that starts out as known-insufficient, and will definitely be unable to meet requirements in case of even normal heat waves, nevermind the what-used-to-be-outlier events that are now far more common. And, because of that planned inadequacy, hundreds or thousands of new temporary AC units will be built, transported, installed, and run at vast otherwise-unnecessary expense and emissions.
Building the initial system to meet requirements under any conditions found in the last two decades, and using modern AC technology that allows motors to run at variable speeds (vs compressor ON/OFF only) would be vastly more energy-efficient, and actually more climate-friendly.
Sheesh