Paving defines the floor of your outdoor space and can unify your design while also providing access. Use permeable materials wherever possible to allow rainwater to soak back into the ground. Also consider recycled or at least locally sourced materials to minimize the environmental impact. Recycled paving materials include: crushed oyster shells, tumbled glass cullet or pottery and recycled concrete “flagstones”. Refer to Chapter 7, Accessories: Furnish the Room in The New American Front Yard for more information, photos and a chart comparing the “greenness” of various paving types.