Lots of misinformation out there (and here) about pine. Alaskans do not burn mostly (or even very much) pine. Sorry. Inland and farther north they have mostly birch, tamarack and cottonwood. In the south along the coast and the Alaska panhandle they have spruce, cedar and hemlock. Most people I know up there burn spruce or birch. Here is a map of the firewood species that are common there.
Pine is not even listed:
http://www.alaskawoodheating.com/availability.php
There is also a huge spread in pine species quality for heating with, from pinion pine which has more heat than most of the better hardwoods, to the softer punky stuff like white pine or balsam fir. On my property here I have a lot of lodgepole pines (pinus controta), which is a premium firewood in the west. But even that species has three main sub types, and they grow and burn differently. I have two sub types of lodgepole; shore pines and Murrayana. The latter here are commonly called jack, black, or Sierra lodgepole pines and they get huge. Shore pine is hard and dense, and that burns pretty hot. The Murrayana burns good and has medium heat, about like elm for comparison.
In general, evergreens are a bad name for conifers, as there are several conifers that are deciduous, including larch/tamarack, bald cypress and dawn redwood. Also softwoods are a bad name for them as well, as many are harder than hardwoods, and many (including pines) have more heat available in them than hardwoods. For example, pinyon pine has 27 M-BTU per cord, which is about the same as black locust or hickory. Good stuff, eh? Western Larch (AKA: Tamarack) is a preferred species for firewood here, with about 28 M-BTU per cord. Doug fir is not far behind larch or pinyon pine, with 26 M-BTU per cord. I burn more Doug fir than any other wood here. It is good wood to heat with and has really low ash. For that reason, it is a premium wood to use in wood pellets. Doug, along with larch, are also the standard woods here in the western US for dimensional lumber and framing/building with. They have similar strength to southern yellow pine.
Here is a BTU chart for western tree species, and some eastern species to compare them to. These types of charts are highly varied, but for most western species (and the common eastern species that grow here) this is the best chart that I have found:
http://firewoodresource.com/firewood-btu-ratings/