The State of Parana has added one more star to its green reputation: since a few days ago it hosts the largest solar water heater Brazil, built with 1.8 thousand PET bottles and 1.5 thousand tetra-packs. The heater was installed in Palmas, in southern Parana, over a building belonging to the Brazilian army that serves as home for 50 soldiers and consumes eight thousand liters of water daily.
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