onal park. In return, Del Oro was allowed to throw large amounts of waste in the form of orange peels (皮) on a 3-hectare piece of land within the national park at no cost. Dealing with tons of leftover peels usually involved burning them or paying to have them poured into a landfill, so the proposal was very attractive.Р But a year later, another pany challenged the deal in court, arguing that petitor was "polluting a national park". They ended up winning, and the deal between Del Oro and the national park fell through.Р Then in 2013, while discussing possible research avenues with Timothy Treuer, Daniel Janzen mentioned the orange peel story. Feeling interested, Treuer decided to stop by that piece of land that had been covered with fruit waste 15 years earlier. What he found shocked him.