Surface biomes

[SpomJ]

    Surface biomes should be very rare and cover full planet surface.
    There should be unique plants & animals that produce non-renewable (for now) resources and their growth speed depends on how much light & liquid they get.
    Of course, this is cheating you will say. But It would at least prevent you from researching. It would significantly slow space researching speed, mostly in daytime.
    There will be exposed to space tiles, but they will be much higher than now.
   Example: Iron bamboo. It requires hydrogen atmosphere to grow and grows upwards (nearly) infinitely if requirements are met. Details: It consists of 1-block tiles. Each tile tries to grow another upwards if fully grown. (there should be a mutation when it crashes ceiling on growth). Each tile except top one grows in width (much slower). They already will be counted as fully grown, but only there it starts growing iron. When tile is fully grown in width (this should be 1x1 tile) it starts stopping duplicants from moving through (as regular tiles do) and require hard digging skill to harvest it. When bamboo grows 32 tiles height, it fully breaks into iron and starts from one tile again.