The Great Fire of London (1666) destroyed most of the city.
But it also solved another problem. What?

Question

Accepted Answer

It ended the Great Plague — the fire killed the rats and fleas carrying it. — The plague of 1665 had killed 100,000 Londoners. The fire, disastrous as it was, sterilised the disease-ridden city.

The Great Fire of London (1666) destroyed most of the city. But it also solved another problem. What?