In 1958 China wanted to eradicate 4 pests: the mosquitos responsible for malaria; the rodents that spread the plague; the pervasive airborne flies; and the spar

In 1958 China wanted to eradicate 4 pests: the mosquitos responsible for malaria; the rodents that spread the plague; the pervasive airborne flies; and the sparrows which ate grain seed and fruit. Guess what the result was: it exacerbated the Great Chinese Famine, in which 15–45 million people died of starvation. Because with no sparrows to eat the insects, locust populations ballooned, swarming the country. https://en.wikipedia.org/wiki/Four_Pests_Campaign https://en.wikipedia.org/wiki/Four_Pests_Campaign Don't eradicate a species, before you're really sure it's not going to cause much larger problems.