Could breathing become a luxury? Cities in the US are being hit with their worst air quality in recorded history as wildfires in Canada send smog billowing across the sky. Get used to it, say experts — the era of clean air is over.
America suffocates as smoke darkens the sky
Emergent emergency: The WHO refers to dirty air as “the world’s largest environmental health risk". Glossary
Dystopian - Relating to an imagined society where there is great suffering or injustice.
Charles Dickens - The Victorian novelist is credited with inventing Christmas as we know it today through the warm descriptions of it in his books.
Air pollution - The presence in the air of harmful or poisonous substances. Air pollution can cause many health problems.
Smog - A kind of toxic fog caused by high levels of air pollution.