Everyone has pointed out the scale but there are two other reasons why is different. First, burning wood is carbon neutral. The tree pulled it from the air and

Everyone has pointed out the scale but there are two other reasons why is different. First, burning wood is carbon neutral. The tree pulled it from the air and burning returns to the air. Second, there are natural processes that absorb carbon and keep system in a balance. Trees are one, plankton is another, and longer term is rock weathering. Even if the ancestor were using coal, the absorption processes could keep up with the small amount.