Above is an interesting article by "National Geographic", I think its good to have an objective view and even though we know burning wood pellets hugely reduces pollution and emissions for domestic heat production. Its great to see that there is real effort going into studding weather or not biomass fuels will make a difference if used in commercial electricity generation. 
So have a read, let us know what you think ... this is some real big picture stuff but it should definitely be included in the Wood Pellet conversation.  

Wondering how much heat you need? The energy wise website has a great calculator, that will tell you what kind of heat you need in your neck of the woods. Depending on what type of house you live in , insulation  etc.

So click on the link above and have a nosey , you will probably find you don't need as much as you thought you did.

Also pays to keep in mind that our pellet fires are designed to heat houses not rooms, and most of them will happily heat anywhere form a 100Sm to 150Sm, and when comparing Pellet fires to Wood burners remember that wood burners are rated on how much thay can consume vs a pellet fire that is rated on what it puts into the room. So an 18kw wood burner is roughly equivalent to a 10kw pellet fire.