The next-to-last paragraph in the story seems to contradict the initial claims:
They found clear changes in biomass burning and fire frequency whenever climate changed abruptly, and most particularly when temperatures increased at the end of the Younger Dryas cold phase.
6 posted on 01/27/2009 3:27:38 AM PST by DuncanWaring
(The Lord uses the good ones; the bad ones use the Lord.)