Remember that using birch and pine as regular firewood can be dangerous if you are burning them in a chimney.
Pine resin gets stuck to the walls of the chimney after having burnt and make it easier for a chimney fire to start.
Birch is very flammable and produces a tall flame that can get to the soot of the chimney and ignite it.
Avoid those trees wood if possible or use them just as fire starters if you are not burning them in a campfire.
