Learning Task 2. Directions. True or False. Write True if the statement is correct and False if the statement is false. 1. Mang Juan is a farmer and he sprays his crops with herbicides to kill insect pest and with insecticides to kill weeds. 2. Mang Juan uses insecticides to kill pests, this helps to protect our ecosystem. 3. Organic farming using natural fertilizers for crops helps to conserve the environment. 4. To conserve the environment, farmers should grow a variety of crops instead of only one crop. 5. To help protect our environment, Mang Juan uses insects to fight other insects.​