Health effects of acid rain: are there any?
D000143:Acids / Q000009:adverse effects*; D000393:Air Pollutants / Q000009:adverse effects*; D006801:Humans; D008670:Metals / Q000009:adverse effects; D011891:Rain; D014887:Weather
D000143:Acids; D000393:Air Pollutants; D008670:Metals