[EvertonDiehard]

Explainer: What is causing growing rat infestations in S'pore, and what can be done? Pest control firms said that one macro cause is global warming, where higher temperatures increase a rat’s appetite for food as well as causes them to multiply quicker.

Overcrowding is the main reason for the increase in rat infestation in SG. When 6 million people crowd into a tiny country meant to hold no more than 3 million inhabitants, the amount of food waste will keep rodents well fed.