Growing in Alaska

Looking at a map the other day it was cool to see what all there's. It's a gagillion airports. Why is that? , Alaska is covered in a sheet of ice, so can be grown there as fruits and vegetables?.

The southern coast of Alaska is rainforest land, so quite a few plants grow, with zones 4, 5, 6—so would be similar to the Midwest in terms of minimum temperatures. Even up in the tundra, I’m guessing there are cloudberries, crowberries and others.

Alaska hardiness zones: https://www.gardeningknowhow.com/planting-zones/alaska-planting-zones.htm

Airports, probably because locations are so remote and things get transported more by air.

Sorry some reason nothing came through saying there was a reply which is bad weird.

Something as lush as rainforest thrives there sounds cool, it took good environmental soup for that to happen. Cloud and Crowberries I never heard of those. Says they can be into jellies. Have you had any of agutak (traditional Alaskan ice cream), what's said of being from those berries?

Looking at the hardiness map , it's a thin a strip from this view Yet says that the southern coast and "panhandle" of Alaska make up the Tongass National Forest, which is the - largest -temperate rainforest in the United States.

What can grow on the lowest scale of the cold part. I hear hardy vegetables like parsnips, carrots and I think potatoes but I there's a limit of how cold that can be for those to sprout right?