If an asteroid hit we won't be just dealing with 10-12 feet.
Do you have any scientific proof that this will happen or that it's likely to happen?
https://www.pnas.org/content/early/2019/07/02/1904822116
https://www.businessinsider.in/One-of-Antarcticas-biggest-gl...
https://www.pnas.org/content/early/2019/07/02/1904822116
https://www.businessinsider.in/One-of-Antarcticas-biggest-gl...