Shack alert - Danny Meyer's Shake Shack has announced today that it will be opening a second Brooklyn location near the new Barclays Center. The new outpost, located at 170 Flatbush Avenue will also be extremely green: "constructed with a variety of recycled and sustainable materials, and feature energy-efficient kitchen equipment and lighting. Chairs and booths will be made from lumber certified by the Forest Stewardship Council, and tabletops will be made from reclaimed bowling alley lanes from Brooklyn’s own CounterEvolution. Plus, 100% of electric usage will be offset through Renewable Energy Certificates, supporting wind farms across the United States." Look for a Fall 2013 opening on this one.