[Pollution] From "Alerta Ambiental" to "Emergencia Ambiental"

Winter is here, and with it the heating burning wood, which causes massive pollution in the cities of Chile when the weather does not clean up.
In preparation for the lack of wind this week, the government declared this monday

• "Alerta Ambiental" in the cities of Santiago, Talca, and Maule;
  
• "Preemergencia" in the city of Temuco; and
  
• "Emergencia ambiental" in the cities of Valdivia and Osorno.
  

The air is still good, it is preemptive, but a reminder of bad things to come...