text: Seiler and Crutzen further estimated that wildfires in temporal plus boreal forests comprised ~35.7% of all dry matter burned but pointed out that 7090% of such wildfires were due to human activity (e.g., campfires, debris burning, cigarettes, etc.). Thus, of total world fire emissions today, ~7.1% (3.6%10.7%) may be natural and the rest, anthropogenic. Houghton indicates that, in 1850, CO2 emissions from land use change may have been ~34% those in 2005. Thus, in 1850, BB emissions were lower than those today. Such emissions may have been mostly anthropogenic although partly natural as well. Today, BB emissions are much higher with only a small percent natural.