I have been notified that my Spellchecker was not so smart this morning when I wrote this post. I'm editing now. ..... I haven't quite finished the long article yet but i will. I find it interesting that our water company uses the same technology to find impervious surface areas on each property and charge accordingly for water run off. Thank goodness we have dense trees on our lot making it near impossible for their infared camera to look through. They consider wood deck as impervious when we specifically chose and constructed the decking ourselves in areas because it drains water through the cracks and back into Earth vs concrete, a truly hard, impervious surface. We even laid our flagstone like a floating floor so that it takes the water in instead of allowing for run off. The water company's cameras don't see these construction techniques as beneficial to the Earth it water system, however. And we get charged a little extra fire what it can see through the trees.