List one obstacle faced by implementation of Green Revolution by farmers in developing world.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Green Revolution**: The Green Revolution refers to a series of research, development, and technology transfer initiatives that increased agricultural production worldwide, particularly in developing countries. It involved the use of high-yielding variety (HYV) seeds, fertilizers, pesticides, and irrigation techniques.

2. **Identifying Obstacles**: While the Green Revolution aimed to improve food security and agricultural productivity, farmers in the developing world faced several obstacles in its implementation.

3. **Focusing on Agrochemicals**: One significant aspect of the Green Revolution was the reliance on agrochemicals, which include fertilizers, pesticides, fungicides, and herbicides. While these chemicals can enhance crop yield and control pests, they also pose challenges.

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