"DQ, I wholeheartedly support your view of growing your own food, on land that you know is not contaminated. We may not be able to grow or buy food that is free from toxins, but we can help by not adding to the problem, by not using chemicals and poisons ourselves.
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This would be the wise view.
Mineral rich produce (without toxins) is optimal. Many of the practices used in permaculture can get you there.