Pollution

Carbon monoxide produces carbon dioxide when it burns with a blue flame in the presence of oxygen. Metal manufacture, energy generation, metal ore and coal mining, food production, oil and gas extraction from land or sea, chemical production, cement lime, plaster and concrete manufacturing, and petroleum refining are all examples of industrial operations that produce carbon monoxide.

A secondary pollutant is formed in the atmosphere as a result of chemical reactions between primary pollutants. Sulphur dioxide (SO2) is a primary pollutant, meaning it is directly emitted from sources like factories and vehicles.
PAN is a secondary pollutant formed from reactions involving nitrogen oxides and volatile organic compounds (VOCs) in the atmosphere.
Smog is a combination of smoke and fog, primarily consisting of ozone, particulate matter, and other secondary pollutants.
Ozone (03) is a secondary pollutant created in the atmosphere through the interaction of sunlight with nitrogen oxides and other pollutants.

Carbon dioxide is a primary pollutant, directly emitted from sources like burning fossil fuels.
Carbon monoxide is also a primary pollutant, emitted from incomplete combustion.
While fly ash is a particulate matter, it's considered a primary pollutant, released directly from industrial processes.

Methane is a potent greenhouse gas, responsible for about 30% of the global temperature rise since the Industrial Revolution. Its atmospheric concentration is now 2.5 times higher than in the preindustrial era and is rising faster than other greenhouse gases. The three major anthropogenic sources of methane emissions are agriculture, energy, and waste sectors.
The energy sector - comprising oil, natural gas, coal, and bioenergy - accounts for over 35% of human-induced methane emissions.

Carbon Monoxide is a colorless, odorless gas created by incomplete combustion of carbon-based fuels such as gasoline, diesel, and wood, as well as the combustion of natural and manmade items like cigarettes. CO is particularly problematic in metropolitan environments, where it contributes to photochemical smog and surface ozone generation through synergistic effects with other pollutants. Ozone concentrations, even at moderate levels, have consequences on the respiratory system.
Carbon monoxide produces carbon dioxide when it burns with a blue flame in the presence of oxygen. Metal manufacture, energy generation, metal ore and coal mining, food production, oil and gas extraction from land or sea, chemical production, cement lime, plaster and concrete manufacturing, and petroleum refining are all examples of industrial operations that produce carbon monoxide.