Farmers use biodegradable fertilizer bags to reduce environmental pollution by applying them directly to the soil where crops are grown. These bags are designed to break down naturally over time, releasing nutrients slowly and evenly into the soil. This method minimizes runoff, which is a major contributor to water pollution, and reduces the risk of chemical leaching into groundwater. By using biodegradable bags, farmers can also decrease the amount of plastic waste that ends up in landfills or the natural environment, thus contributing to a more sustainable agricultural practice.