Which of the following is an environmental concern related to agriculture?

Soil erosion is a significant environmental concern related to agriculture due to its impact on land productivity and ecosystem health. When soil erodes, it loses its nutrients and structure, leading to a decline in fertility and productivity. This loss not only affects the immediate area but can also result in sedimentation of waterways, affecting aquatic ecosystems and water quality. Additionally, soil erosion can contribute to the release of carbon stored in the soil, which has implications for climate change.

In contrast, increased crop yield, enhanced biodiversity, and improved pest resistance are generally seen as positive outcomes of agricultural practices. While they may have their own sets of challenges, such as the need for sustainable management practices or potential trade-offs with natural ecosystems, they do not inherently raise environmental concerns in the same way that soil erosion does. Understanding the implications of soil erosion helps in developing sustainable agricultural practices that minimize environmental impact while maintaining productivity.