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| French | English |
| dioxine-p de dibenzofuranne polychloré | polychlordibenzo-p-dioxin PCDD are formed (along with variants including furans) when compounds containing chlorine are burnt at low temperature in improperly operated/designed domestic refuse and industrial waste incinerators where PCDDs can be found in both the flue gases and the fly ash |
| R.P.A. | photosynthetically active radiation |
| R.P.A. | P.A.R. |