Last year, the city greenlighted zoning changes along a nearly 800-acre swath of the river, a move that could “throw open the doors to about 18 million square feet of high-rises,” the Tribune’s Ryan Ori reported. Over the next decade, 150,000 people could move to the area as a result — or more, if Amazon decides to build its HQ2 on the more than 70-acre Lincoln Yards site proposed by developer Sterling Bay.