Answer:
The topic of atmospheric pollution and the damage that pollutant gases produce on our atmosphere has been a raging one for decades now.
Pollutant gases, like sulfur oxide and nitrogen oxide, which are released into our air from various sources due to the use of fossil fuels, are part of the reason why today we can talk about acid rain. Acid rain is an unnatural event in which the acidity present in the water that comes down from clouds due to the mixture of water vapor with nitrogen oxide and sulfure oxide, is much higher than normal. And the damages to our planet are very extensive.
As such, the answers to your questions would be:
1. A car´s catalytic converter removes nitrogen oxide pollution and is most efficient at room temperature: True. This is because catalytic converters have an optimum operating temperature, and when a car´s engine has just been started, or has been exposed to cold, the converter will take some time to become fully operational.
2. The largest source of sulfur oxide pollution is burning coal for power plants: True. This, unfortunately, is still true in today´s world. Power plants still largely use fossil fuels, and most importantly coal, as their power source, and coal, when burned, produces abundant amounts of sulfur oxide.
3. Most nitrogen oxides formed during combustion come from nitrogen in the fuel: True. According to the EPA, even with the work done to resolve this, combustion of gasoline, rich in nitrogenous elements, produce release of nitrogen oxides.
