In a flurry of activity on its last work day of the year, the New York City Council on Tuesday passed several-housing related bills – including one that will require large co-ops and condos to post a letter grade that rates their energy efficiency.  The bill, known as Intro 1632, was introduced by Manhattan city councilman Dan Garodnick, who will leave office at the end of the year because of term limits. The new law, which goes into effect in 2020, will require all buildings 25,000 square feet or larger to use their water- and energy-use data, now compiled annually under Local Law 84, to create a letter grade on their energy efficiency. The grades, similar to those in restaurants that reflect compliance with health regulations, must then be posted by all public entrances of the buildings.    Read the article………………