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Natural gas does not smell.  But the practice of adding odorant to make natural gas smell like rotten eggs has been done for decades for your safety. In 1937, at a school in New London, Texas, a [...]

Skunk’s spray, rotting meat, bad breath, and swamp water all have something chemically in common. Chemists tend to agree that a class of molecules known as ‘mercaptans’ are the smelliest [...]