Resources for the Future Pizer and Kopp. 3. cost to the economy.5 This is the notion of cost most often described by economists (e.g., Harberger 1971; Diamond and Mirrlees 1971). Defining and estimating Ci ()az, is far from trivial.
For stepping stones that are going to see a lot of use, you should consider using reinforced concrete so that your stepping stones are more durable. This type of concrete also sells at most hardware stores, often under the names gravel mix reinforced or fiber reinforced premixed concrete..
This is a type of landscape rock that you are probably most familiar with. It is widely used in a variety of landscaping and building projects. Flagstone is a term used to describe flat pieces of stone that can be used for decorative and/or functional purposes. You can use flags going to create a patio or a walkway.