This definitely gets said a lot, but I am not sure it's a meaningful thing to say. After all, something like 20% of emissions come from agriculture. If you count that as industrial emissions (surely it is an industry) then it must dwarf personal footprints. But the food you eat surely belongs to your personal footprint as well?

I'm not confident that when people make this comparison, they account for the double counting. After all, most (?) industry does something that's eventually consumed by someone. What proportion of responsibility goes to the industry versus the consumer? Obviously not a well-posed problem.