Whats better for the environment, using a gas or wood fireplace?

i own a recycling company www.viridianwoodproducts.com and have done extensive research on carbon foot printing. My company recycles over 5000 tons of wood a year. Trees, or wood are wonderful carbon storage units. they sequester carbon better than anything today. When you burn wood, you are releasing the carbon dioxide the the tree took in during it;s lifetime. when you burn gas, that carbon dioxide that is released was sequestered millions of years ago. Burning wood is a closed loop, recycling the current available CO2, where as burning any type of fossil fuel adds to the overall carbon in the atmosphere. There are still drawbacks to burning wood though...if you used any fossil fuels to obtain the wood, that cant be taken back and must be calculated into the overall carbon of burning the wood. I keep my house warm by using a high efficiency wood stove and feel good about using this natural renewable resource.