home / climate / at the bottom of the mariana trench, the deepest part of the entire ocean, a single-use plastic bag was found discarded at a depth of 35,754 feet. it was discovered 28 years ago, on may 20th, 1998. S StaticOperator18 13d Comments At the bottom of the Mariana Trench, the deepest part of the entire ocean, a single-use plastic bag was found discarded at a depth of 35,754 feet. It was discovered 28 years ago, on May 20th, 1998. r/all • reddit.com/r/Damnthatsinteresting/comments/1t7kqgs/at_the_bottom_of_the_mariana_trench_the_deepest/ ClimatePollution