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It is a beloved post-holiday tradition.

Brooklynites can unburden themselves of their decaying Christmas trees and return them to the earth from whence they came during the Parks Department’s annual ritual sacrifice of festive furs to the city’s wood-chipping machines — better known as Mulchfest.

The pine-pulverizing-palooza is one of the highlights of the year for the agency because it gives everyone a chance give back — literally — to the city’s green spaces, according to the agency’s head honcho.

“MulchFest is one of the many annual events that I look forward to because it’s such an easy way to show our commitment to caring for parks across the city,” said parks commissioner Mitchell Silver.

Kings County residents can contribute their tired old tannenbaum to the cause at one of 10 drop-off locations across the borough until Jan. 8 or leave it on the curb for pick-up until Jan. 14.

But the main event will take place on Jan. 7 and 8, when locals can see their spruce ground into plant food before their very eyes — and then take the remains home to sprinkle around their own garden.

And Brooklynites have some work to do this year — we only contributed around 9,000 trees out of the city’s 30,000 during last year’s fest, according to a department spokeswoman, down from more than 10,000 the year before.

Here are this year’s locations:

Drop-off only

Amazing Garden (261 Columbia St. at Caroll Street in Cobble Hill)

Brower Park (Brooklyn Avenue at Prospect Place in Crown Heights)

Coffey Park (Dwight and Verona streets in Red Hook)

Green Space (222 Fifth Ave. at President Street in Park Slope)

McGolrick Park (Monitor Street and Driggs Avenue in Greenpoint)

Prospect Heights Community Farm (254 St. Marks Ave. at Vanderbilt Avenue in Prospect Heights)

Red Hook Park (Lorraine and Henry streets in Red Hook)

Sunset Park (44th Street and Sixth Avenue in Sunset Park)

Transmitter Park (Greenpoint Avenue between West Street and the East River in Greenpoint)

Washington Park (Third Street and Fifth Avenue in Fort Greene)

Chipping locations

Brooklyn Bridge Park (99 Plymouth St. at Adams Street in Dumbo)

Cobble Hill Park (Clinton Street and Verandah Place in Cobble Hill)

Fort Greene Park (Washington Park and Myrtle Avenue in Fort Greene)

Maria Hernandez Park (Suydam Street and Knickerbocker Avenue in Bushwick)

Marine Park (E. 33rd Street and Avenue U in Marine Park)

McCarren Park (Lorimer Street and Driggs Avenue in Williamsburg)

Owl’s Head Park (68th Street and Colonial Road in Bay Ridge)

Prospect Park (Third Street and Prospect Park West)

Prospect Park (Park Circle at Parkside Avenue in Windsor Terrace)