Living on Mars?

[hamishspence]

So then they are not comparable, and I'm still waiting for you to substantiate your assertion that the collapse of any space elevator (including those that DON'T weight megatons) would be dangerous.

I'm not sure how dangerous the 750 ton one would be if it broke. Probably not very.

I could see the middle of the collapsing cable moving faster than the terminal velocity of a feather, but slow enough not to have burned up before it hits something in its path though.

There's also the question of what scales in between 750 tons and 1 million tons, are worth taking into consideration, when it comes to "possible space elevators that might be constructed in the future".