SANTIAGO: Dangerously high pollution levels have Chile’s capital on the brink of issuing an environmental emergency, the first such time the measure is to be implemented in 16 years. The emergency status—the highest-level alert allowed—is earned when the air quality index, considered good at 0-50, reaches hazardous levels as it tops 500. Orrego’s move means that 40 percent of vehicles must stay off the roads, while 3,000 factories and other businesses must shut down in the capital area of 6.7 million. The extremely high pollution has hit just as Chile hosts the Copa America, with the capital one of the main venues. The regional federation does not allow matches to be cancelled because of air quality.