Arsenic is used as a preservative in wood for fencing and construction to withstand dampness and prevent rotting. Wood containing arsenic is generally called "pressure-treated" wood, and it should not be burned or even handled without gloves - or at least the hands should be washed thoroughly after contact. You can recognize pressure-treated wood by its slightly greenish color. Wood stove pellets are not treated with arsenic. I hope this helps clear things up. Nancy and critters [Posted in FML issue 3663]