The soil and drainage are still intact,

The soil, it appears, is suited to the seed, for it has sent its radicle downward, and it may now send its shoot upward also with confidence. Why has man rooted himself thus firmly in the earth, but that he may rise in the same proportion into the heavens above?

The bridges are still intact.

I'm intact, and I don't give a damn.

There's a lot of carbon stored in the soil. If the permafrost does thaw, as our model predicts, it could have a major influence on climate.

Keep the soil healthy and the bad seed won't grow.