During the Cenozoic era,mountain building in western North American was caused by tectonic activity.
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Some countries that span both Europe and Asia include Turkey, Russia and Kazakhstan. They are called trans continental countries. Even though Europe and Asia are continents in their own rites, geographically speaking they span one landmass known as Eurasia. The landmass rests on the tectonic plate known as the Eurasian plate.
Carbon has a total 6 protons.
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I think the correct answer from the choices listed above is option A. Lawn fertilizer is the source that is the <span>most difficult to track and regulate. This is because fertilizer used in a lawn are not measured strictly and most likely there are no clear regulations about the use of it. Also, runoff of such is very difficult to follow. It can go anywhere. Hope this answers the question.</span>
