we consume a credit card worth
This "credit card" bit got popularized in news media because it was mentioned in this brochure put out by the World Wildlife Fund (WWF) on plastic ingestion: https://awsassets.panda.org/downloads/plastic_ingestion_pres...
Their claim in turn comes from this study from the University of Newcastle that was prepared specifically for the WWF (which suggests a potential conflict of interest), according to the list of references in the WWF brochure above. However, I'm not able to find the actual full paper anywhere, and this page last noted that it was being reviewed for publication: https://www.newcastle.edu.au/newsroom/featured/plastic-inges...
Since 2000, more plastic has been produced worldwide that all the preceding years combined, and about a third of the plastic ends up in nature, according to the report.
Obviously it varies person to person but if you drink water, breathe air or use table salt, you are still ingesting plastics on a daily basis.
>Per lifetime? Per year? Per kilogram of food? Can you give a bit more context to this comment?
Everyone has a different line of credit.
It's not only the few grams of microplastic that might be ingested physically.
Rather the consumerism of society which drives demand for the kilotonnes of plastic to begin with.
Plus without exersicing a line of credit it would not be possible to consume more than you were worth.
When the more sustainable move financially, environmentally, and socially is to work toward making consumption an insignificant fraction of what people are worth.