If you have a pool you should think about pool solar heating, which means no more expensive heating bills for you along with knowing that you are using a renewable source (the sun).
The truth is that the world has an energy problem - you have probably heard. Even in some of the richest parts of the world the electricity supply cannot be guaranteed - California has had its fair share of problems in recent years, and in parts of southern Europe when the air conditioning units go on, the electricity supply sometimes goes off. If you heat electrically, or with gas or oil, you are contributing to the problem.
Solar swimming pool heaters use one of the most effective, and simplest, alternative energy sources. The water is heated by the radiating heat of the sun in exactly the same way we human beings are. Of course the panels are painted black to absorb as much heat as possible, and modern units have clever devices for stopping evaporated heat loss and so on. But the idea behind solar heating is that simple.
A swimming pool solar heater will open up the pool for much more of the year, since it can heat the water temperature to make cooler days perfectly pleasant for swimming. Hence you get to save money, help the environment, and enjoy many more days in the pool!