Wildfires are rapidly expanding into cities and suburbia, exposing us to toxic smoke now filled with burning plastics and metal. | Hans Gutknecht/Media News Group/Los Angeles Daily News via Getty Images Wildfires are popularly considered wild — restricted to the remote wilderness or the edge of forests, and to most, a problem for the dry and hot states of the Western US. But over the past few years, and now across the country, these fires are getting less wild and far more urban.  Key takeways Urban construction is rapidly expanding into the wilderness, putting more communities c...