Not any kind of answer? I surveyed the literature a year ago. Lots of 'microplastics exist!' but no 'microplastics cause harm'. There's dust and sand everywhe

Not any kind of answer? I surveyed the literature a year ago. Lots of 'microplastics exist!' but no 'microplastics cause harm'. There's dust and sand everywhere too. Yes, plastic is artificial. Other than that label, is there any, any evidence it is an actual problem?