Ozone Action Day - In 2000, Ozone Action day was discontinued. In previous years, these announcements were made when forecasted weather conditions made it likely that an ozone exceedance would occur on the following day. Now citizens are encouraged to alter their ozone-producing behaviors each day throughout the ozone season, and especially on Air Pollution Watch days to help the region avoid an ozone exceedance on that day. Coarse particulates include dust, soot, and other small particles that are released into the air, usually by activities that involve the crushing, grinding, and abrading of surfaces. Construction activities, the burning of wood, agricultural burning, and certain industrial processes also create coarse particulate matter.
Fine particulates result primarily from combustion processes.
The burning of different fuels, whether from industrial, residential, or mobile sources, releases very small particles that can coalesce in the air and react with other chemicals. Many air pollutants occur as gases or vapors, but some are tiny solid particles such as dust, smoke, or soot. When an individual chooses any alternative rather than driving alone. Options include carpooling, vanpooling and using mass transit. SIP - State Implementation Plan.