Wall Street Journal: The U.S. government’s huge inventory of properties is likely to be at the forefront of a national green-building push that will serve two aims of the Obama administration: promoting energy efficiency and boosting infrastructure spending as a way to revive the economy. In a speech Jan. 8 at George Mason University in Fairfax, Va., then President-elect Barack Obama said he wanted to modernize 75% of existing federal buildings. Much of this modernization is likely to be energy-efficiency …