One way to get people to produce less garbage is to charge them

One way to get people to produce less garbage is to charge them for it. So-called pay-as-you-throw programs-in which municipalities bill residents for their garbage-have been around for decades but are becoming more widespread. And they work.Now that(people) are aware that trash has a cost,they begin looking for alternatives to putting things in a trash can.
Putting a p______on trash.
【正确答案】：price