If your talking about the brown gas u see above cities then that is smog and it consists of carbon monoxide and ozone.
Nitrogen Dioxide
Yes it is gas.
Nitrogen dioxide is a reddish-brown gas that contributes to the color of smog haze. It is produced from the reaction of nitrogen oxides with sunlight and other pollutants in the atmosphere. Nitrogen dioxide is a harmful air pollutant that can cause respiratory issues and contribute to the formation of ozone and smog.
The current theory of Brown's Gas states that Brown's Gas is a mixture of di-atomic and mon-atomic hydrogen and oxygen. A: Brown's Gas (Oxyhydrogen) is a mixture of hydrogen and oxygen used in welding. It is not coloured.
No.
by gas masks and oxygen packs.
A harmful substance added to the environment is carbon dioxide, a greenhouse gas emitted from burning fossil fuels that contributes to global warming and climate change.
Bromine gas has a reddish-brown color.
ozone
Natural gas.
Ozone present in the troposphere is also called as bad ozone. It is also a green house gas. It is the major constituent of the urban smog.
The gas formed from combining copper and nitric acid is reddish-brown in color due to the formation of nitrogen dioxide gas, which is a reddish-brown gas.