Which of the following is NOT one of the main components of soil?

The main components of soil include mineral matter, organic matter, and water, which together create a balanced environment for plant growth and various soil organisms. Mineral matter is primarily made up of weathered rocks and contributes to the soil's texture and nutrient content. Organic matter, which comes from decomposed plant and animal material, enriches the soil and enhances its ability to retain moisture and nutrients. Water is essential for the biological processes within the soil and for the plants that rely on soil for nutrients.

Plastic waste, on the other hand, is not a natural or beneficial component of soil. It does not decompose like organic materials and can lead to pollution and soil degradation. While plastic may be present in some areas due to human activities, it does not contribute positively to the soil's structure or health and is not recognized as a fundamental component of healthy soil. This distinction is critical in understanding soil composition and the dynamics of soil health.