Alaska is so enormous and sparsely populated that I doubt much that the residents do will have a significant impact on the ambient CO2 levels, compared to a sta

Alaska is so enormous and sparsely populated that I doubt much that the residents do will have a significant impact on the ambient CO2 levels, compared to a state like Texas or California, which are about 80 and 250 times more population dense for their size. I agree with all the rest of your factors, though high CO2 is likely not a mark in Alaska's favor. My main concerns with Alaska would be suitably large cleared land area to collect sunlight without damaging the environment, and not having panels get covered in snow in the winter.