11.   Then a chemical, similar in principle to antistatic laundry spray, was applied, removing the static charge from the spores, keeping them apart for good.

12.   They are called electrostatic filters because as air passes through them it creates a static electric charge that causes dust to stick to the mesh inside the filter.

13.   They create a static charge that attracts dust particles.

14.   When liquid runs through a pipe, it builds up a static charge on the pipe itself.