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Some insects are not good for people. In Egypt, thousands of years ago, millions of locusts ate all the plants that were growing. There was no food for people to eat and many people died. In Africa today, locusts still do the same thing.
For most people the worst kind of insect is the cockroach. It is bigger than many insects and not easy to kill. People can get sick when cockroaches walk on their food. In hot countries there are cockroaches everywhere. Some people think if something happened and most animals died, cockroaches would be the only animals still living.
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Which is the worst kind of insect for most people?