These problems include the inability to connect to Wi-Fi, 3G and/or Edge, lack of push notifications and issues with the YouTube application. Fortunately there are several fixes you can try to correct these data issues on your iPhone: 3.
Chimney soot is another contaminant resulting from incomplete combustion, and it forms when wood does not burn hot enough (less than 284 degrees). This powdery brown or black dust sticks to the inside of chimneys (sometimes escaping into the air) and carries a few risks similar to creosote, such as: Lung Hazard.
Creosote is a tarry substance that forms when wood burns and is carried up the inside of a chimney as part of the smoke. The creosote collects on the inside of the chimney and traps carbon, usually soot, which is also part of the smoke from burning wood. The mixture dries and bakes against the inside of the chimney.