The Onset of a New Global Winter
The greatest threat would come after the impact. Dust and particles filled with sulfur would flood the atmosphere, blocking sunlight for up to fifteen years. Global temperatures would crash. Crops would fail. Ecosystems would collapse. A second mass extinction would begin.
Only a small portion of the human population might survive, possibly in underground shelters or remote regions with more stable climates. Those survivors would face the enormous task of rebuilding civilization. But remarkably, they might have a powerful resource to help them.
