I'm more concerned about contamination by heavy metals from car exhaust and other pollutants. The metals like nickel, cadmium and lead end up in the soil and th

I'm more concerned about contamination by heavy metals from car exhaust and other pollutants. The metals like nickel, cadmium and lead end up in the soil and then in the fruits and you can't wash it away. Not sure about fruit trees but I know it's a concern for tomatoes grown in urban context. https://www.efsa.europa.eu/en/topics/topic/metals-contaminants-food https://www.efsa.europa.eu/en/topics/topic/metals-contaminan...