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...system. Figure 1 An example extract from a meteorological report for Edmonton, Canada. Somewhere between the observations like those recorded in Figure 1 and a weather forecast is a team of professional meteorologists. No doubt among them will be those whose tasks include a consideration of the observers' reports of cloud type, which is a rich source of immediate weather...

...system whose primary energy source is coal. Useful electrical energy delivered to the home is much less than the primary energy used in generating it. This is due to losses through inefficiency at the power station, in transmission and in running household appliances. It is important to remember that the primary energy released by all forms of energy resources is not the...