Seems to be a lot of different things that are on the 2035 timeline. It's almost as if ...

It's almost as if journalists like numbers ending in 0 or 5.

Any napkin math for how much CO2/year can be attributed to obesity?

increased respiration, increased farming, etc.

edit: “ The researchers estimated that obesity contributes to an extra 700 megatons of carbon dioxide emissions per year worldwide, or about 1.6% of all human-caused emissions” - WebMD

“Fat shaming” could be renamed to “global warming shaming” at this point, and it is only getting worse, especially methane.

In a more morbid vein: any napkin math for how much CO2 is saved by the reduced life-expectancies of those afflicted by obesity?

That should already be accounted for if they did the calculations right.