First, these pavers allow water to pass through them. Our permeable plastic pavers have 87% porosity. As a result, installing pavers improves water drainage while lowering runoff. The second reason is that grass pavers are made from post-consumer recycled materials, which are used instead of concrete. Cement manufacture generates large CO₂ emissions. https://modutile.com/product/gravel-pavers-outdoor-basketball-court-base-24x24/