[ShteiLoups]

But add significant amounts of litter.

At least in North America, people will just toss their trash on the ground if there isn't a garbage can available, but if there is a bin around they will make use of it. Might be able to chalk that up to cultural differences when discussing Japan, however.

[criddell]

The city of Portland did a study once where they removed trash cans in some parking garages and the amount of litter went down. The theory was that if there's trash on the ground (as there often is around trash cans, especially when they are full) people will throw more trash onto the pile. Get rid of the trash can and people will carry their trash out.

[Reason077]

"in North America, people will just toss their trash on the ground if there isn't a garbage can available, but if there is a bin around they will make use of it."

Better than in the UK, where many people toss their rubbish on the ground if there isn't a bin available. If there is a bin available, they still toss it on the ground.