Who are human being's most dangerous enemy? The lions? The tigers? Or the aliens? The answer is the rats. Rats carry many diseases which has killed hundreds of millions of people.
They not only carry diseases into people's homes,but also take people's food. They eat 33 million tons of grain every year. That is enough to feed 200 million people—so people die of hunger because rats eat their food.
Rats are clever too. They have good leaders. Men try to poison them, but if their leaders tell them that food is dangerous they will not eat it. So our cities and villages are full of rats. This dangerous enemy is too clever and grows too fast, so we cannot wipe out them.
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