A number of years ago there were several instances of children receiving severe burns when the fleece material of their pyjamas caught fire. Children's pyjamas are now treated with flame retardants. Suppose that legislators became concerned about the use of fossil fuels for running private vehicles. You were appointed to a board which would make recommendations about places where plastic use could be reduced. Sulphur is a by-product of the natural gas extraction industry.
Coal contains sulphur.