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Nigeria’s crude oil is low in sulphur and, as one of the most prized in the world, fetches a higher price than many of its competitors.

Wealthy Victorians travelled from as far as London believing the local sulphur and iron-rich water had healing powers.

In addition to the danger of the release of toxic sulphur dioxide gas, just being exposed to dust particles from the concentrate can damage a person’s respiratory system.

First, by removing asbestos and sulphur and then by using renewable materials.

Pinatubo, the resulting half a degree of global cooling was the result of about 15 million tonnes of sulphur dioxide injected into the stratosphere.