the AQI is this high for people to stay indoors during the day and reduce activities that pollutes the air

The Air Quality Index (AQI) is a scale used to measure and report air quality in a specific area. It ranges from 0 to 500, where higher values represent worse air quality and more potential health risks.

1. If the AQI is between 0 and 50, the air quality is considered 'Good' and it's safe for people to stay outdoors.
2. If the AQI is between 51 and 100, the air quality is 'Moderate' and sensitive people should consider reducing intense outdoor activities.
3. If the AQI is between 101 and 150, the air quality is 'Unhealthy for Sensitive Groups' and people with respiratory or heart disease, the elderly and children should limit prolonged outdoor exertion.
4. If the AQI is between 151 and 200, the air quality is 'Unhealthy' and everyone may begin to experience health effects and should limit prolonged outdoor exertion.
5. If the AQI is between 201 and 300, the air quality is 'Very Unhealthy' and everyone may experience more serious health effects and should avoid all outdoor physical activity.
6. If the AQI is above 300, the air quality is 'Hazardous' and everyone should avoid all outdoor physical activity.

As for activities that pollute the air, these include burning fossil fuels (like coal, oil, and gas), using cars and airplanes, manufacturing processes, and the use of certain products like paints and aerosols. Reducing these activities can help improve air quality.