What outcome is improved by using recycled materials in drainage systems?

Using recycled materials in drainage systems leads to a significant reduction of landfill waste. This practice not only minimizes the amount of new waste generated but also promotes sustainability by utilizing existing materials that would otherwise contribute to environmental degradation. The incorporation of recycled materials means less extraction of raw resources, which can lead to pollution and habitat destruction.

Moreover, using recycled materials helps to create a circular economy, where products and materials are reused, leading to a more sustainable approach in construction and infrastructure. This practice contributes to an overall positive environmental impact by decreasing the burden on landfills and reducing the demand for new materials. Thus, the correct choice highlights the ecological benefits of recycling in the context of drainlayer practices.