[["Everything on Earth has some purpose in the environment. Flies are a great source of food for many animals & they also help rotting plants & animals to decompose faster so they don't pile up & stink.", 18.0], ["Flies that visit flowers are helpful in the pollination of flowering plants. The maggots of hover flies are welcomed by gardeners because they feed on aphids, reducing numbers of those pests. Many flies are parasitic, feeding on moth caterpillars, beetle grubs, and other pest species.", 12.0], ["Yes! Aside from attacking insects that eat our crops, they also clean up our parks and streets by consuming rotting animal flesh, dead foliage and leaves along with animal feces. Flies also serve as a a large food source for fish and amphibians. ", 0.0]]
do flies help the earth
animals,gnats,mosquitoes,flies