It provides the daily forecast, current conditions, Spare The Air alerts, plus the daily burn status for Sacramento County from November through February. Even for healthy people, polluted air can cause respiratory irritation or breathing difficulties during exercise or outdoor activities. People most susceptible to severe health problems are:
Pollutant and Greenhouse gas An air pollutant is a material in the air that can have adverse effects on humans and the ecosystem. The substance can be solid particles, liquid droplets, or gases. A pollutant can be of natural origin or man-made. Pollutants are classified as primary or secondary.
Air pollution affects all regions of the world. However, populations in low-income cities are the most impacted. According to the latest air quality database, 97% of cities in low- and middle- income countries with more than , inhabitants do not meet WHO air quality guidelines. The United States has made great progress since in cleaning the air, but the job is far from complete. November 15, marks a milestone in Clean Air Act history, the signing of the Amendments. These amendments set the stage for protecting the ozone layer, reducing acid rain and toxic pollutants, and improving air quality and visibility. Outdoor air quality has improved since the s, but many challenges remain in protecting Americans from air quality problems. Ground-level ozone, the main part of smog, and particle pollution are just two of the many threats to air quality and public health in the United States.
Primary pollutants are usually produced by processes such as ash from a volcanic eruption. Other examples include carbon monoxide gas from motor vehicle exhausts or sulphur dioxide released from the factories.
Secondary pollutants are not emitted directly. Rather, they form in the air when primary pollutants react or interact. Ground level ozone is a prominent example of secondary pollutants. Some pollutants may be both primary and secondary: Before flue-gas desulphurization was installed, the emissions from this power plant in New Mexico contained excessive amounts of sulphur dioxide.
Schematic drawing, causes and effects of air pollution: Thermal oxidisers are air pollution abatement options for hazardous air pollutants HAPsvolatile organic compounds VOCsand odorous emissions.
Substances emitted into the atmosphere by human activity include: Carbon dioxide CO2 — Because of its role as a greenhouse gas it has been described as "the leading pollutant"  and "the worst climate pollution". Clean Air Act is deemed to regulate CO2 emissions. SO2 is produced by volcanoes and in various industrial processes.
Coal and petroleum often contain sulphur compounds, and their combustion generates sulphur dioxide.
Nitrogen oxides NOx — Nitrogen oxides, particularly nitrogen dioxideare expelled from high temperature combustion, and are also produced during thunderstorms by electric discharge. They can be seen as a brown haze dome above or a plume downwind of cities.
Nitrogen dioxide is a chemical compound with the formula NO2. It is one of several nitrogen oxides. One of the most prominent air pollutants, this reddish-brown toxic gas has a characteristic sharp, biting odor.
Carbon monoxide CO — CO is a colorless, odorless, toxic yet non-irritating gas. It is a product of combustion of fuel such as natural gas, coal or wood.Making decisions using NICE guidelines explains how we use words to show the strength (or certainty) of our recommendations, and has information about prescribing medicines (including off-label use), professional guidelines, standards and laws (including on .
An air quality index (AQI) is a number used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become. As the AQI increases, an increasingly large percentage of the population is likely to experience increasingly severe adverse health effects.
CAPCOA is an Association of Air Pollution Control Officers representing all thirty-five local air quality agencies throughout California. We have been in existence since , and are dedicated to protecting the public health and providing clean air for all our residents and visitors to breathe.
This guideline covers road-traffic-related air pollution and its links to ill health.
It aims to improve air quality and so prevent a range of health conditions and deaths. Ontario Regulation / Air Pollution – Local Air Quality IMPORTANT NOTE: This material is meant only as a brief summary of some of the requirements set out in Ontario Regulation / Information contained in this document is not considered law.
Update of WHO Global Air Quality Guidelines. Air pollution is the largest single environmental risk for health, recognized by the World Health Assembly (WHA) Resolution of May as .