normal burning in a sentence

1. The mechanism of charring is part of the normal burning of certain solid fuels like wood.
2. In late October, officials had announced that the normal burning off of corn stubble would be forbidden.
3. After seven and a half minutes of normal burning, the flames lay down as in the computer simulation.
4. :Since most chemical weapons are made of hydrocarbons, they can be burned in a high temperature incinerator which will break them down into harmless gases like water vapor, carbon dioxide, etc . Note, however, that normal burning is not effective.
5. It's difficult to find normal burning in a sentence.