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 How is this determined?
How is this determined?
| water 30 wetlands 17 soil 6 Mercury 4 Nitrate 4 cod 4 nitrogen 4 freshwater 4 phragmites 4 environment 4 Chlorine 4 Sulfate 3 methylmercury 3 summer 3 Selenium 3 pollution 3 pesticides 3 fish 2 marshland 2 winter 2 shrimp 2 lettuce 2 Toxicity 2 Seeds 2 Egg 2 salt 2 | heavy metals 2 Nutrients 2 Petroleum 2 rice 2 irrigation 2 Triclosan 2 rectum 2 recycling 2 eggs 2 Acacia 2 Fat 2 oak 2 Lindane 2 Schistosomiasis 1 copper 1 Metolachlor 1 biodiversity 1 Coriander 1 lakes 1 Soybean 1 DDT 1 Vegetables 1 Zinc 1 wild rice 1 lead 1 |