All Sites In August 2013, the NRDC estimated that local California communities spend more than $428 million each year to keep marine debris from polluting our waters, which is an average of $10.71 per resident. It’s also estimated that up to 90 percent of floating debris is plastic. As such, solutions must be found for this issue. A webinar scheduled to take place on Wednesday, Feb. 26 will discuss that very topic. read more