因为使用农药对环境和生物形成的污染pesticide contamination

• 该商店出售农药导致食品被农药污染含毒。

  The store sells pesticides that lead to food being tainted by pesticide contamination.

• 套袋的使用，可以使白枇杷无农药污染、不怕鸟儿啄。

  The use of bags can prevent loquats from being contaminated with pesticides and pecked by birds.