If there is leaking sewage from your neighbors, will your edible plants like lettace, rhubarb and fruit trees absorb the toxins and make you sick? And what is the effect of coal ashes, which have heavy metals? How do you know the food you buy is free of problems like this?To what extent do garden plants %26amp; trees absorb environmental toxins?Plants can absorb toxins and store them. That is why dissolved toxins are so dangerous. They can be spread with the water or through the fish and concentrated in carnivores higher up the food chain.
Sewage sludge and food safety as defined by federal regulations.
http://www.iatp.org/foodandhealth/showFi鈥?/a>
Many materials spayed on crops leave residual quantities in the soil for plants to take up. Not every non-organic crop ever becomes tainted with questionable chemicals but some do but there is no way to tell which ones.
http://www.faqs.org/nutrition/Foo-Hea/Fo鈥?/a>
The soils pH at 6.5 -7 has shown crop plants absorb less of the metals. Soil nutrients are most available at this pH so the plants will grow well.
http://books.google.com/books?id=gJhgCQF鈥?/a>
The best way to avoid worrying might be to create raised beds or convert the roof to support one of the roof top growing systems that are so popular in Europe. There are a few companies in the USA also. When you grow your own you know what went in the crop. This way you could enjoy fresh vegetables and can the extra. Home made chow chow is the best.
http://www.baylocalize.org/projects/roof鈥?/a>
http://www.greenroofs.com/
Inspiration page
http://www.ecogeek.org/content/view/902/
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