Ozone is a gas {that} occurs naturally in small (trace) amounts in the upper atmosphere..ozone proctects life on earth from the sun's ultraviolet (uv) near the earth's surfacew, zone is created by chemical reaactions between air pollutants from vehicke exhaust, gasoline vapors, and other emissions. at ground level, high concentrations of ozone are toxic to people and plants -nasa ozone hole watch

which statment best summarizes the main idea being expressed?
a. ozone needs to be at high levels throughout the atmosphere because people and plants need it to live.
b. ozone is toxic, so its presence in the atmosphere is dangerous for the environment.
c. ozone levels can rise or fall without significantly affecting people or the environment.
d. ozone is necessary high in the atmosphere but dangerous in the lower atmosphere.

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Who built the first turnpikes in the united states? a) the national government b) state governments c) private companies d) town councils

Who was put in the concentration camps? and why

During the(answer), roman generals warred over succession. these conflicts drew soldiers away from the frontier and made the empire vulnerable to( answer) a. imperial crisis b.inflation c. pax romana d. great schism e. trade how did the huns contribute to the fall of the western roman empire? select all that apply. a.they stopped trading with rome, which caused inflation. b.they hindered roman trade along the silk road. c.they conquered and burned rome. d.they dealt the roman army a major blow at chaldôn. e.they drove germanic people into the empire. what condition made the byzantines vulnerable to attack by muslim turks? a.the council of nicea b.the death of constantine c.ongoing wars with the sasanian persians d.invasions by huns and germanic peoples today, the (answer) still heads the roman catholic church, which is centered on rome. there is no longer a byzantine emperor, but each country has its own ( answer) to lead the eastern orthodox church there. ceasor b. bishop c. pope d. tsar e. governor f. patriarch g. perfect h. council the teachings of jesus became a religion in large part because ( answer) spread his teachings and gathered followers. paul carried christian beliefs throughout the roman empire and attracted many ( answer) a. apostiles b pharisees c. non jews d.sauducees answer (correct) and i will give brailiest thxx .