13,000 pieces of trash found in, along Mississippi in St. Paul
The litter was logged this spring as part of a community science pilot.
Twin Cities trash is piling up so quickly, 4 landfills need to expand
Waste generation in the metro area was up 30% in the past year.
Reports of North Shore campsites trashed, 'disrespectful' visitors
Locals say most people have been great, but there are higher levels of disrespect this year.