Answer:
the green house effect is gases such as carbon dioxide that trap the suns heat.
Explanation:
by trapping the sun's heat makes it warm enough to have life in it but ti much can cause global warming
Any time stress causes rocks to change, tension is the result.
One of the main factors that unites the different nations of the Europe into a single "Eurozone" is an economic one. It is much easier for all nations to have a single currency than for each nation to have its own. This was a major unifying factor.