As scientists unravel lingering environmental risks from the blazes, construction delays and permitting roadblocks hinder rebuilding efforts.By Kiley PriceWhile people look to start fresh in the new year, many residents in California’s Los Angeles County are still living in the burn scars of the past. A year ago this week, a series of deadly wildfires tore through the region, their spread pushed by winds topping 80 miles per hour and parched vegetation that burned rapidly the moment a spark ignited it.