Reading Comprehension — quick quiz

Read the passage and answer the question. Passage: The Green Revolution in India began in the late 1960s with the introduction of high-yielding varieties of wheat and rice. Punjab and Haryana were the first states to adopt the new technology. Farmers started using chemical fertilizers, pesticides, and modern irrigation methods. As a result, food grain production increased significantly. India, which had been importing wheat, became self-sufficient in food production by the mid-1970s. However, the excessive use of chemical fertilizers has led to soil degradation and water pollution in some areas. Question: What was one negative consequence of the Green Revolution mentioned in the passage?