So like a Stadler Kiss for body mass

I feel like dadjokes would also appreciate it

Fair, made a crosspost

the fat reserves will see it as a weapon

Doubtful since they decrease appetite, which will decrease carbon emissions far more than the tiny amount your body releases.

Consider the carbon cost of manufacturing and distributing the drug too. The most carbon friendly thing you can do it store as much carbon as you can in your body. After you die we can seal you in a drum and throw it into an exhausted oil well.