Points to consider:
a. If we are taken by surprise and have not prepared for such an event, the human race may perish as a result of the impact of a 10-km asteroid.
b. The consequences of the impact on the survival of the human race depends on the location of the impact (e.g., polar regions, mid-latitude ocean, mid-latitude continent).
c. Long-range preparations for a catastrophic impact of an asteroid upon the Earth should include subsurface shelters stocked with food and water to last one year.
d. In addition, home owners could build private shelters where they may survive if they are not in the vicinity of the impact site.
e. The preparations should include stockpiles of materials for reconstruction and information about post-impact conditions to be faced by survivors.
f. In spite of such preparations, most humans would *** as a direct consequence of the impact and its aftermath.
g. The most effective survival strategy may be the establishment of self-sustaining colonies on Mars.
