Corrupted dirt that radiates once you uncover special research, It could drain power from your player and vehicles making mining harder in that area. The more I play the game the more I would like obstacles that slow my progress that aren't mundane or random encounter. Avoiding the current "Enemies" are too easy after you see them once, but if there is a research that you could only get from a certain plant that poses a long term threat that would be pretty cool.