Knowledge and Understanding 1. The sign shown in Fig. 11 is sometimes seen around the country.
(a) Why do you think some people protest against the construction of wind farms in their community?
(b) Do you think that generating electricity in wind farms is environmentally sustainable, socially sustainable and economically sustainable? Give reasons to support your view.
2. Look at the picture below. Identify some ways that electricity could be saved. Fig. 11 (c) Do you think it is ethical to generate electricity in this way? Justify your answer.