How does the presence of wet wood affect the ability of a fire to ignite and sustain itself?

The presence of wet wood can make it harder for a fire to ignite and sustain itself because the water in the wood needs to evaporate before the wood can catch fire. This process absorbs heat and can slow down the ignition and burning of the wood. Additionally, wet wood produces more smoke and less heat, making it less efficient as a fuel source for a fire.