Whose a Rat?  [The] Citizens Air Complaint Program, a public health campaign that invites — and pays — people to report trucks that are parked and idling for more than three minutes, or one minute if outside a school. Those who report collect 25 percent of any fine against a truck by submitting a video just over 3 minutes in length that shows the engine is running and the name of the company on the door. The program has vastly increased the number of complaints of idling trucks sent to the city, from just a handful before its creation in 2018 to more than 12,000 last year. …Mr. Slapikas said he pulled in $64,000 in rewards in 2021 for simply paying attention on his daily walks for exercise: “I would expect to get three a day without even looking.” Who would have thought it? Bounty hunters are more effective than the police at discovering crimes. https://marginalrevolution.com/marginalrevolution/2022/03/bounty-hunters-wor...