This may be a little off the beaten track, but it pertains to the need for energy production. What ever happened to the toy cars that would significantly change colors when handled due to the temperature differences? It seems such a good idea for several purposes. If a building could be a reflective white during the heat of summer and then change to a more absorbent shade during the cold of winter it would save energy. Where are the paint chemists and what is happening in this field? Melodale
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