For established technologies such as drawback are well known and publicized. Fossil and Coal, Gas could be pollution and environmental damage, Nuclear – possible radiation escape-Solar PV – price-Wind – visual effect – Hydro – PR (public relationship) restrain to convert land into lakes. Because I am more interested in scientific aspect then political and social of this emerging technology as Concentrated Thermal Storage Solar let be fair and let me ask you? What could be or go wrong with CS? Please help?