Imagine all the micro-petrochemicals in human tissue from the hundreds of thousands of years of inhaling volatile compounds in fire and coal smoke.

Could we not argue that we have evolved under consistent exposure to petrochemical volatiles?

Or are these microplastics different? They seem extremely stable if they're so persistent in the environment, couldn't that suggests they do not react much at all (at least much much less than coal smoke) and are therefore pretty benign?