In the classical sense, smog equals smoke plus fog, but for the people who live in sun-drenched basins, such as Los Angeles, the equation is a little more complicated. Classical smog is primarily the product of coal-fueled fires from factories and is also known as industrial smog. The smog common in Los Angeles comes from automobile and other fossil-fuel emissions; since the energy of the Sun makes it noxious, it's known as photochemical smog.
An emperor (through Old French empereor from Latin: 'imperator') is a monarch, usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife (empress consort), mother (empress dowager), or a woman who rules in her own right (empress regnant). Emperors are generally recognized to be of a higher honour and rank than kings.
The Roman emperor was the ruler of the Roman State during the imperial period (starting in 27 BC). The emperors used a variety of different titles throughout history.Often when a given Roman is described as becoming emperor in English, it reflects his taking of the title augustus or caesar.Another title often used was imperator, originally a military honorific. Early Emperors also used the title princeps.he Western Roman Empire collapsed in the late 5th century. Romulus Augustulus is often considered to be the last emperor of the west after his forced abdication in 476, although Julius Nepos maintained a claim to the title until his death in 480.