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.
Ironwood is a common name for a large number of woods that have a reputation for hardness.Usage of the name may (or may not) include the tree that yields this wood. Some of the species involved are: 1  Acacia estrophiolata, Southern ironwood. 2  Androstachys johnsonii, Lebombo ironwood.ronwood is a common name for a large number of woods that have a reputation for hardness.