Four predefined vertices define an icosahedron used for constructing a geodesic dome. Such a system has a very rapid electrochromic effect. Nutrient exclusion experiments suggested that enhanced growth was not from nutrient supplementation, but hormone induced growth exogenously mediated by the seedmeal. This modification may follow the HDTV tri-level sync pulses for example, and it may occur in at least one of the HDTV video channels. The second degradation rate is slower than the first degradation rate.