The amount of in the amospher is , and may being leading to warming. In mny countries , are being cut down and , which adds to the air. It also removes that could have used up carbon dioxide to produce .

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Explanation:

The amount of carbondioxide gas in the atmosphere is increased, and may being leading to global warming which melts the glaciers and causes floods. In many countries, forests are being cut down and burnt , which adds carbondioxide to the air. It also removes vegetation that could have used up carbon dioxide to produce food as well as oxygen that released in the environment.

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.

answer; when one group has an extremely high score at pretest;