Northern Virginia is home to the largest concentration of data centers in the world — bigger than the next five U.S. markets combined. In Loudoun County, these massive gray buildings have fueled a billion-dollar local tax windfall, lowering property tax rates year after year. But the boom comes with a cost. Data centers are moving closer to backyards — casting shadows on homes, humming through holidays, and draining nearly a third of Virginia’s electricity supply. Communities are divided: some see opportunity, others see an industrial invasion. Now, Maryland counties are watching closely. From Prince George’s County’s task force hearings to rural Frederick protests, leaders are weighing whether they…..