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..
You can make unique, homemade stepping stones without cement or expensive materials. Sand-dough stepping stones are simple to make, and can be painted to express your personality.pray a square cake pan with cooking spray. Pour the sand dough into the cake pan, and then allow the sand dough to dry for three days. Hold the pan upside down, and then gently tap the bottom of the pan to remove the dried sand dough.