In the Air Act,$\underline {i}$ was amended to include $\underline {ii}$ as an air pollutant.
- A$i = 1981, ii = \text{chemicals}$
- B$i = 1986, ii = \text{particulate matter}$
- C$i = 1987, ii = \text{noise}$
- D$i = 1988, ii = \text{chemicals}$
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