Understand the limitations of solar water heating. The best systems are one third more economical when compared to energy efficient electric water heaters. Don't assume that early morning showers involve only cold water. The water in the tank should stay hot for at least 24 hours.
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Since children are the ones who will be running the future it is important to teach them early about renewable energy. As a parent you can set the example by using solar energy whenever possible. If it is not possible to swap your entire house over, maybe switch out your outdoor lighting.