With the sun obstructed by haze, Spain's players have practised in northern New Jersey ahead of the World Cup final in air declared hazardous due to Canadian wildfires smoke.It was not clear how intensely Spain trained 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 practising 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