That actually sounds like a pretty cool job! I only said something because unfortunately a lot of people tend to use that fact to put down reusable bags, which sucks because even though they're far from perfect, they're still the better alternative (assuming you don't buy a new one every time you go to the store).

Your company has a vested interest in pushing sustainable disposable single use bags over reusable bags, your data is biased, and as mentioned, emissions are less of an issue than the physical pollution and damage of single use packaging being disposed of and ending up in the environment. One reusable bag ending up in the ocean isn't as bad as 400 sustainable ones.