Our friends at Jotul have prepared this great article on tips and advice related to your wood supply...

A wood stove is never better than the wood that is burned in it. Wood types act a bit different – some smolder and turn into big pieces of charcoal, others burn quickly and intensely, but the common factor is that the wood must be as dry as possible. This provides the best heat and easiest lighting, and makes it much easier to burn wood in an environmentally conscious way.

If the wood is not dry, the heat in the wood stove will be used to evaporate moisture and emissions of particular matter and other pollution increases simultaneously. Ignore all old superstition that the wood should be a little bit "damp". The ideal is as little moisture as possible. The minimum requirement in the trade for calling wood "dry" is 20% moisture, but it is no problem to get it down to 14-15% in an ordinary climate and such an improvement is definitely noticeable...