Also, given the average puff is about 35mL of smoke, and there's about 30 puffs average in a 0.5g joint, that gives us 1050mL of smoke in a 0.5g joint, or about 1.05kg (to unit transfer here) per 0.5g joint. There's an estimate of 5.1480x10^18^kg (think five quintillion) of fluid in the atmosphere. So that would be an increase by a factor of about 4.9 quintillion. Converting the joint weight to kg gives you 0.0005kg per joint. So you multiply those.

Your joint would have to be 2.451429x10^15^kg of weed. 2.45 quadrillion kilos. For reference, the weight of all humans on this earth combined is about 390 billion kilograms.

I'm tired lmao someone check my work I may be stupid