Feat: Adding a notebook tutorial for the EPA dataset: CO levels (#422)

datasets/epa_historical_air_quality/docs/tutorials/co_levels_trends_analysis/artifact.yaml

@@ -0,0 +1,22 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+artifact:
+  title: "Trend analysis of CO levels in the US"
+  description: "Analysis of trends and seasonality of the CO levels in the US."
+  tags:
+    - techniques: [trend analysis, visualization, time series analysis]
+    - libraries: [statsmodel, matplotlib, pandas]
+    - vertical: government
+    - tier: free