diff --git a/minetest-mod-womd/init.lua b/minetest-mod-womd/init.lua
index 022f846..0ac5b1b 100644
--- a/minetest-mod-womd/init.lua
+++ b/minetest-mod-womd/init.lua
@@ -9,4 +9,24 @@ minetest.register_node("womd:radioactive_air", {
 	drop = "",
 	damage_per_second = 1,
 	groups = {not_in_creative_inventory=1},
+})
+
+minetest.register_abm({
+	nodenames = {"womd:radioactive_air"},
+	neighbors = {"default:air"},
+	interval = 10.0,
+	chance = 10,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		minetest.set_node(pos, {name = "default:air"})
+	end,
+})
+
+minetest.register_abm({
+	nodenames = {"default:air"},
+	neighbors = {"womd:radioactive_air"},
+	interval = 15.0,
+	chance = 10,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		minetest.set_node(pos, {name = "womd:radioactive_air"})
+	end,
 })
\ No newline at end of file