First, for a typical family, let us assume that there are four people in the house.
Figure 1.1 shows a range of electricity usage for the industrialized countries. Let us use
6000 kWh/person/year as an average. But, this includes all their electrical needs including
at work, at school, as well as the electricity needed for manufacturing the products
they buy, powering their street lights, pumping water to their homes, and so on