[chromacity]

Calcium perchlorate is only slightly toxic. Not good for you, but living in an environment with background radiation levels 50x higher than on Earth may be your bigger worry...

Still, I'm pretty sure we have plenty of people who wouldn't mind giving it a try.

[RetpolineDrama]

>but living in an environment with background radiation levels 50x higher than on Earth

We can park a big honkin magnet at the mars-sun lagrange point and cut that down massively.

[amluto]

On the one hand, it's not particularly toxic as toxic things go. On the other hand, 0.6% is not a small concentration.

[burnt-resistor]

Anyone venturing to Mars is likely taking a one-way trip for many reasons.