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.
During annual chimney inspections, excess creosote is removed. Not only is removal of creosote important to keep your chimney in good working condition, but the buildup of creosote can cause your fireplace to smell like asphalt or barbeque gone bad. Creosote is a black or dark brown flammable tar produced by wood smoke.