The new State Police barracks on the north side of the Meadowbrook State Parkway, just north of Hempstead Turnpike, has green features: Its geothermal system powers the heating and cooling, and the pavement is porous, so water percolates into the ground instead of flowing into sewers or culverts, a spokesman said.  Construction began in 2016 and the building cost $17.5 million. Credit: Howard Schnapp

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