True or False: Air quality has consistently improved in all metropolitan areas, leading to universally healthy air composition.

The statement that air quality has consistently improved in all metropolitan areas, leading to universally healthy air composition, is false. While it is true that air quality has improved in many areas due to stricter regulations and advancements in technology, this improvement is not uniform across all metropolitan regions. Various factors, such as specific local industries, geographical features, and population density, can lead to significant differences in air quality.

Many urban areas still experience high levels of air pollution from vehicle emissions, industrial activities, and other sources. Moreover, certain regions may also face challenges due to natural factors, such as wildfires or geographic conditions that can trap pollutants. Therefore, while progress has been made, the realities of air quality are complex and vary widely, hence the answer being false.