The way to get rid of rats is not poison, it's to remove their food sources. The only reason they live in the sewer system is that there's always something ther

The way to get rid of rats is not poison, it's to remove their food sources. The only reason they live in the sewer system is that there's always something there for a rat to eat. The whole sewer system we use will have to be redesigned. Not impossible, but definitely not easy.