The large magnitude of solar energy available makes it a highly appealing source of electricity. The United Nations Development Programme in its 2000 World Energy Assessment found that the annual potential of solar energy was 1,575â49,837 exajoules (EJ).
Definition of IRONWOOD. 1. : any of numerous trees and shrubs (as a hornbeam or hop hornbeam) with exceptionally tough or hard wood. 2.: the wood of an ironwood.See ironwood defined for kids.ADVERTISEMENT.. : any of numerous trees and shrubs (as a hornbeam or hop hornbeam) with exceptionally tough or hard wood. 2. : the wood of an ironwood. See ironwood defined for kids.
Cast iron is a member of iron-carbon alloy family with the carbon content greater than 2%. It is one of the oldest ferrous alloys used in construction and outdoor ornaments. It is hard, brittle, nonmalleable and more fusible compared to steel. But properties slightly vary depending on the composition of the material.