Create norway_air.markdown (#8381)

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source/_components/norway_air.markdown

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+---
+layout: page
+title: "Norway Air Quality"
+description: "Display the current status of Norway air quality."
+date: 2019-02-02 18:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: metno.png
+ha_category: Health
+ha_iot_class: "Cloud Polling"
+ha_release: 0.88
+---
+
+The `norway_air` component [queries](https://luftkvalitet.miljostatus.no/) the Norway air quality [data feed](https://api.met.no/weatherapi/airqualityforecast/0.1/documentation) provided by the Norwegian Meteorological Institute.
+
+To add air quality sensor to your installation, add the following to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+air_quality:
+  - platform: norway_air
+```
+
+{% configuration %}
+name:
+  description: Additional name for the sensor.
+  required: false
+  type: string
+  default: Air quality
+forecast:
+  description: If you want to get forecast data instead of the current data, set this to the number of hours that you want to look into the future.
+  required: false
+  type: integer
+latitude:
+  description: Manually specify latitude.
+  required: false
+  type: number
+  default: Provided by Home Assistant configuration
+longitude:
+  description: Manually specify longitude.
+  required: false
+  type: number
+  default: Provided by Home Assistant configuration
+{% endconfiguration %}