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.
Solar heaters are becoming an important alternative in Brazil, where electric water heaters account for 47% of the household energy consume in critical hours (
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