How would are life would change if earth astmosphere were damaged

More and more greenhouse gasses would enter out atmosphere and not exit. We would overheat and die due to it. The trees would die due to the carbon dioxide overload.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

b) the planets year length would be longer

hope this !