That sounds like the right ballpark for making a big stir-fry, including a lot of mincing of ginger and garlic and peppers. Not something I do every day, though

That sounds like the right ballpark for making a big stir-fry, including a lot of mincing of ginger and garlic and peppers. Not something I do every day, though! I feel like this is off by an order of magnitude. However... as soon as you do something like use a serrated knife to cut bread on a cutting board? There's no way that wouldn't produce a ton of microplastics. Or if you scoop chopped vegetables by sliding a sharp knife -- that's also going to produce a lot of plastic particles. So it might not be a terrible estimate for some sizeable fraction of the population.