Answer:
If it weren't for these, no one would be aware of Idaho's existence.
What can be grown without sun or soil and can either provide nourishment or deliver poison?
It's a symbol and a fruit, For man's folly, evil's root. But also for great inspiration, and famous application.
What is round, has a twin, and sees more than most?
I'm a small sweet cake, typically round, flat, and crisp. I come in a variety of flavors from chocolate chip to oatmeal raisin.
Brings the sky a lot closer.