Chemical pesticides are used in nearly all farming operations undertaken in developed countries. However, increasing concern over the harmful effects that pesticides may have on the environment has led to the use of alternative forms of pest control. For example, farmers use crop rotation to prevent pests that feed on a certain crop. Also, certain pests are controlled by introducing an organism that damages or kills the pests, but leaves the crops unharmed. Finally, some crops are being genetically engineered to be more resistant to pests.
Основной идеей текста является …
Farmers use alternative forms of pest control to engineer some crops genetically.
Farmers use alternative forms of pest control to undertake farming operations in developed countries.
Farmers use alternative forms of pest control to introduce an organism that damages or kills the pests.
Farmers use alternative forms of pest control because of increasing concern over the harmful effects that pesticides may have on the environment.
