The job is complicated because any liquid that hits metal will cause corrosion.

Ferrous metals may cause damage to the separator, and they are usually removed from the waste stream magnetically before the eddy current separator is used.

Consequently, metals get hot very quickly and can cause the oven to "arc" which is not good!

Unlike its predecessors, this technology did not utilize metals, which improves cloaking since metals cause some light to be lost.

However, as these fabrics have aged, the metals in the fibres have accelerated their decay and caused them to become extremely brittle.

The metal causes the vibrational modes to start and stop again very quickly.

Some metals more reactive than others like magnesium and aluminium will cause a secondary reaction.

It is believed that the metal caused one of the Concorde's tires to blow out.

Research has also shown that the metal, dubbed the "silent killer", can cause high blood pressure in men, complications during pregnancy and fetal damage.

To make matters worse, the heavy metals may cause serious air pollution.