RAISE AWARENESS
Vescovo hoped his discovery of trash in the Mariana Trench would raise awareness about dumping in the oceans and pressure governments to better enforce existing regulations, or put new ones in place.
"It's not a big garbage collection pool, even though it's treated as such," Vescovo said of the worlds' oceans.
In the last three weeks, the expedition has made four dives in the Mariana Trench in his submarine, "DSV Limiting Factor," collecting biological and rock samples.
It was the third time humans have dived to the deepest point in the ocean, known as Challenger Deep. Canadian movie maker James Cameron was the last to visit in 2012 in his submarine, reaching a depth of 35,787 feet (10,908 meters).
Prior to Cameron's dive, the first-ever expedition to Challenger Deep was made by the U.S. Navy in 1960, reaching a depth of 10,912 meters
