With the sun obstructed by haze, Spain’s players practiced Thursday ahead of the World Cup final outside in northern New Jersey while air conditions are hazardous because of smoke from Canadian wildfires.It was not clear how fast-paced a practice Spain held. Media members are only able to observe the first 15 minutes of what was scheduled to be a hourlong session in East Hanover beginning at 11 a.m. EDT.Argentina remained in the Atlanta area to work out less than 24 hours after rallying to beat England and reach the final for a second consecutive tournament. Marietta, Georgia, is far enough south to avoid the effects of the fire, which are being windblown to the southeast from northern Ontario, triggering warnings from the U.S. Midwest through the Northeast.Officials urged people to stay inside or wear masks outside as air quality reached unhealthy to hazardous levels, meaning it’s unhealthy for anyone, regardless of health conditions. Experts expressed concern over holding practice outdoors.“These are high-level athletes who are moving a lot of air through their lungs during every practice in every game, and really they shouldn’t be practicing outside if the air quality levels are at hazardous sort of ranges for wildfire-related air pollution,” said Dr. Courtney Howard, an emergency room physician and Global Climate and Health Alliance official. “That’s the time to schedule a practice inside. You could put an N95 mask on them, but trying to make sure that everybody’s mask is well-fitted, I suspect that’s not the best choice. I would go find an air-conditioned indoor facility that’s a clean-air shelter.”