Table 1 Percentages of correct answers on the knowledge questions
Question # | Topic | Percentage correct (pretest) | Percentage correct (posttest) |
|---|---|---|---|
1 | Visibility of PM | 61% | 72% |
2 | Diseases caused by PM | 16% | 35% |
3 | Weather effects on PM | 98% | 95% |
4 | Mitigation of PM | 88% | 90% |
5 | Diesel as a source of PM | 33% | 44% |