Is damage caused by a hazardous environment, such as caustic atmosphere, or lava, get reduced by soak?
It seems a little silly to me that hazardous atmosphere could be ignored thanks to someone wearing good armor while breathing it in.
Similarly, lava doesn't seem all that dangerous if someone with a soak of 7 or 8 is only taking 2 or 3 damage each round. I've had characters in my game who would gladly wade through lava and pop a healing potion, rather than try to find a slower way around it.