water quality measurement Air quality measurement 1 Aluminium compounds 1 Ammonia 1 Condensation 1 Copper smelting 1 Environmental impact 1 Fermentation 1 Iron and steel 1 Nitric acid 1 Paper production 1 Petrochemicals 1 Petroleum production 1 Petroleum refining 1 Phosphoric acid 1 Phosphorus 1 Polymer theory 1 Potassium salts 1 Pulp production 1 Sulfur 1 Sulfuric acid 1 poly condensation 1 radio active waste 1 risk analysis 1 sodium salts 1