Study determines how long Legos take to dissolve in sea water

“The bricks were then weighted. Hence, the study was able to analyze mass loss of a Lego piece due to sand abrasion, hard surface impacts, photodegradation of plastic, contact with seawater. The blocks have lost between 3% and 40% of their original mass. This led to an estimate, that this type of plastic may remain in marine environment for approximately 100 to 1300 years.”