What is the primary disadvantage of conventional farming techniques?

Conventional farming techniques primarily rely on the use of synthetic tools and chemicals, including pesticides, herbicides, and fertilizers, to enhance crop production and control pests. While these substances can lead to higher yields and lower production costs, their use is associated with various environmental and health concerns.

For instance, chemical runoff can contaminate water sources, harming aquatic ecosystems and affecting human health. Moreover, the reliance on synthetic chemicals can lead to the development of pesticide-resistant pests and contribute to biodiversity loss. Therefore, option C accurately represents a significant downside of conventional farming practices, highlighting the trade-off between immediate agricultural productivity and long-term environmental sustainability.