Smoke coming out from incense and candles is said to be harmful to your health.

Atmospheric scientist Stephan Weber from the University of Duisberg-Essen in Essen, Germany conducted a study at the St. Engelbert Church in M?im an der Ruhr, Germany, where church staff regularly burn candles during mass and also incense on some holidays. Incense burners and candles were lit for services at midnight on December 25th, until the morning of the following day, as well as during New Year's Eve. Only candles were burned during regular services.

Basically, he measured certain particles from the candle and incense smoke that are considered harmful to our lungs, heart and arteries.

To aid in his study, Weber placed two devices in the church that enabled him to measure the air quality in the church for 13 days since Christmas Eve. "The equipment measured concentrations of particles up to 10 micrometers in diameter (PM10) and also those 1 µm or smaller (PM1) ..."

And what did he find out?