Because of

1. The atomic power stations are all located on estuaries because of the vast quantities of water required for cooling purposes.
2. If, because of increases in demand, the price of other goods increase, the production of these goods will become more profitable.

3. While changes in demand can take place in the very short period, changes in supply, because of technical problems, take much longer.
4. If the cost of living has increased because of a rise in import prices, then, if other things do not change, any wage increase must lead to a further rise in prices.