The smoke is back. Large swaths of America are once again engulfed in a toxic haze that’s drifted down from Canada, which is experiencing its worst fire season on record. Our northern neighbor has burned through a record-breaking 8.2 million hectares so far this year, sending smoke plumes as far as Europe. And, despite the best efforts of hundreds of firefighting personnel who have come from all over the world to pitch in, the fires don’t look like they will be winding down anytime soon.
