minetest.register_on_generated(function(minp, maxp, blockseed)
        biome_lib.blocklist_aircheck[#biome_lib.blocklist_aircheck + 1] = { minp, maxp }
end)

minetest.register_on_generated(function(minp, maxp, blockseed)
        biome_lib.blocklist_no_aircheck[#biome_lib.blocklist_no_aircheck + 1] = { minp, maxp }
end)