Discuss the sources and environmental impact of carbon monoxide emissions. What measures can be taken to reduce CO levels in urban areas?
a) Carbon monoxide is primarily produced by photosynthesis in plants and can be reduced by increasing vegetation.
b) Carbon monoxide is mainly emitted by volcanic activity and can be reduced by monitoring volcanic eruptions.
c) Carbon monoxide is predominantly released from the incomplete combustion of fossil fuels and can be reduced by improving vehicle emissions standards and promoting public transportation.
d) Carbon monoxide is mostly generated by the industrial production of plastics and can be reduced by recycling more plastics.