http://www.iowawatch.org/2018/06/01/large-number-of-iowa-public-schools-in-range-of-potential-pesticide-spray-drift/
We conservatively used the distance of 2000 feet to calculate potentially harmful proximities of croplands to Iowa public school buildings…89.6 percent of Iowa PK-12 public school buildings (1183 of 1321) are within 2000 feet of cropland. This means 444,559 students and teachers in…