A study says we're consuming a lot of microplastics
                                
                                
                                    (Newser) -
                                    You're ingesting a secret ingredient when you eat, drink, and breathe: microplastics. The question is, does it matter? A new study estimates that the average adult ingests at least 98,000 plastic particles annually, the  Seattle Times  reports. The particles apparently come from various sources including shellfish, sugar, salt,...