Quoted By:
post if you smell it (also, dont smell it if you don't have to...)
post your general location in your country
post the weather and temp
take notice of odd bird activity (circling in groups flying low, breaking eggs)
take notice of any other odd details
post photos of the sky
take a cup of water and leave it out for an hour to see if it turns milky
sciencefags feel free to chime in on how to detect something weird in the air
