Mots Croisés Polluting agents.Version en ligne Solve the puzzle by deciphering the pollutants. par Luis Palacios 1 applies to various gaseous binary chemical compounds formed by the combination of oxygen and nitrogen. the most frequent causes are forest fires, volcanic activity and bacterial decomposition. 2 It is a gas without smell or color but very dangerous. It can suddenly cause illness and death. its chemical formula is CO. 3 It is a colorless and vital gas for life on Earth, but in excess it is polluting. Its chemical formula is CO2 4 It is a colorless, irritating gas with a pungent odor. Its chemical formula is SO2. 5 it is a powerful and aggressive gas that, at high levels, corrodes materials, buildings and living tissues. 6 It is a well-known blue-gray metal, which exists naturally in small quantities in the earth's crust, and can become highly polluting. and its chemical symbol is Pb 2 4 5 6 3 1
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