diff --git a/source/behaviour/biomes/1.12.0/biomes.json b/source/behaviour/biomes/1.12.0/biomes.json
new file mode 100644
index 00000000..5905e672
--- /dev/null
+++ b/source/behaviour/biomes/1.12.0/biomes.json
@@ -0,0 +1,18 @@
+{
+	"$schema": "http://json-schema.org/draft-07/schema",
+	"$id": "minecraft.behavior.biomes.1.12.0",
+	"type": "object",
+	"title": "Biomes",
+	"description": "The definition of a biome",
+	"additionalProperties": {
+		"title": "Tag",
+		"type": "object",
+		"description": "Components with no namespace are treated as 'tags': any name consisting of alphanumeric characters, '.' and '_' is permitted; the tag is attached to the biome so that either code or data may check for its existence; tag components may not have member fields.",
+		"additionalProperties": false		
+	},
+	"properties": {
+		"minecraft:climate": { "$ref": "./components/minecraft.climate.json" },
+		"minecraft:forced_features": { "$ref": "./components/minecraft.forced_features.json" },
+		"minecraft:overworld_height": { "$ref": "./components/minecraft.overworld_height.json" }
+	}
+}
\ No newline at end of file
diff --git a/source/behaviour/biomes/1.12.0/components/minecraft.climate.json b/source/behaviour/biomes/1.12.0/components/minecraft.climate.json
new file mode 100644
index 00000000..54d1c49e
--- /dev/null
+++ b/source/behaviour/biomes/1.12.0/components/minecraft.climate.json
@@ -0,0 +1,51 @@
+{
+	"$schema": "http://json-schema.org/draft-07/schema",
+	"$id": "minecraft.behavior.biomes.1.12.0.components.minecraft.climate",
+	"title": "Climate",
+	"description": "Describes temperature, humidity, precipitation, etc.  Biomes without this component will have default values.",
+	"type": "object",
+	"minProperties": 0,
+	"maxProperties": 7,
+	"additionalProperties": false,
+	"properties": {
+		"temperature" : {
+			"title": "Temperature",
+			"description": "UNDOCUMENATED",
+			"type": "number"
+		},
+		"downfall" : {
+			"title": "Downfall",
+			"description": "UNDOCUMENATED",
+			"type": "number"
+		},
+		"red_spores" : {
+			"title": "Red spores",
+			"description": "UNDOCUMENATED",
+			"type": "number"
+		},
+		"blue_spores" : {
+			"title": "Blue spores",
+			"description": "UNDOCUMENATED",
+			"type": "number"
+		},
+		"ash" : {
+			"title": "Ash",
+			"description": "UNDOCUMENATED",
+			"type": "number"
+		},
+		"white_ash" : {
+			"title": "White ash",
+			"description": "UNDOCUMENATED",
+			"type": "number"
+		},
+		"snow_accumulation": {
+			"title": "Snow accumulation",
+			"description": "UNDOCUMENATED",
+			"type": "array",
+			"items": [
+				{ "type": "number"},
+				{ "type": "number"}
+			]
+		}
+	}
+}
\ No newline at end of file
diff --git a/source/behaviour/biomes/1.12.0/components/minecraft.forced_features.json b/source/behaviour/biomes/1.12.0/components/minecraft.forced_features.json
new file mode 100644
index 00000000..d4427ad8
--- /dev/null
+++ b/source/behaviour/biomes/1.12.0/components/minecraft.forced_features.json
@@ -0,0 +1,13 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "minecraft.behavior.biomes.1.12.0.components.minecraft.forced_features",
+  "title": "Forced features",
+  "description": "Force specific decorative features (trees, plants, etc.) to appear in this Biome, regardless of normal decoration rules.",
+  "type": "object",
+  "minProperties": 0,
+  "maxProperties": 2,
+  "additionalProperties": false,
+  "properties": {
+    
+  }
+}
diff --git a/source/behaviour/biomes/1.12.0/components/minecraft.overworld_height.json b/source/behaviour/biomes/1.12.0/components/minecraft.overworld_height.json
new file mode 100644
index 00000000..6a7771ea
--- /dev/null
+++ b/source/behaviour/biomes/1.12.0/components/minecraft.overworld_height.json
@@ -0,0 +1,40 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "minecraft.behavior.biomes.1.12.0.components.minecraft.overworld_height",
+  "title": "Overworld height",
+  "description": "Noise parameters used to drive terrain height in the Overworld.",
+  "type": "object",
+  "minProperties": 0,
+  "maxProperties": 2,
+  "additionalProperties": false,
+  "properties": {
+    "noise_params": {
+      "title": "Noise params",
+      "description": "UNDOCUMENATED",
+      "type": "array",
+      "items": [{ "type": "number" }, { "type": "number" }]
+    },
+    "noise_type": {
+      "title": "Noise type",
+      "description": "UNDOCUMENATED",
+      "type": "string",
+      "enum": [
+        "stone_beach",
+        "deep_ocean",
+        "default",
+        "default_mutated",
+        "lowlands",
+        "river",
+        "ocean",
+        "taiga",
+        "mountains",
+        "highlands",
+        "mushroom",
+        "less_extreme",
+        "extreme",
+        "beach",
+        "swamp"
+      ]
+    }
+  }
+}
diff --git a/source/behaviour/biomes/biomes.json b/source/behaviour/biomes/biomes.json
new file mode 100644
index 00000000..444af1a0
--- /dev/null
+++ b/source/behaviour/biomes/biomes.json
@@ -0,0 +1,17 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "$id": "minecraft.behavior.biomes",
+  "type": "object",
+  "examples": [{ "plains": { "format_version": "1.12.0" } }],
+  "additionalProperties": {
+    "type": "object",
+    "title": "Biome",
+    "description": "A biome definition",
+    "allOf": [
+      {
+        "if": { "properties": { "format_version": { "type": "string", "const": "1.12.0" } } },
+        "then": { "$ref": "./1.12.0/biomes.json" }
+      }
+    ]
+  }
+}
diff --git a/source/compress specification.json b/source/compress specification.json
index 1d05d6ee..95b11c9a 100644
--- a/source/compress specification.json	
+++ b/source/compress specification.json	
@@ -104,6 +104,10 @@
       "Source": "./behaviour/animations/animations.json",
       "Destination": "../behaviour/animations/animations.json"
     },
+    {
+      "Source": "./behaviour/biomes/biomes.json",
+      "Destination": "../behaviour/biomes/biomes.json"
+    },
     {
       "Source": "./behaviour/loot_tables/loot_tables.json",
       "Destination": "../behaviour/loot_tables/loot_tables.json"