The us environmental protection agency issues a daily report for pollution levels called the

Air Quality Index (AQI)

Explanation:

Air quality index (AQI) is a report which informs the public about the level of pollution. When AQI rises, so does public health risk.

In the United States, AQI comprises six categories that indicate increasing levels of health risk. If AQI value is below 50, it means that air quality is good. On the other hand, if value reaches 300, air quality is unhealthy.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.