Question

what is the main reason for changing the use of pesticides over time? to save farmers money to reduce water consumption to experiment with different chemicals environmental and health concerns

Explanation:

Pesticide use changes over time mainly due to environmental and health concerns. Pesticides can harm ecosystems (e.g., kill non - target species, contaminate soil and water) and human health (e.g., cause illnesses from exposure). Saving farmers' money is not the main driver as new pesticides may be costly. Reducing water consumption is not related to pesticide use change. Experimenting with chemicals is not the primary reason; the focus is on addressing environmental and health impacts.

Answer:

environmental and health concerns