<span>The populations are already sparse (due to being mainly desert) added to the fact that there is a huge influx of people seeking work oppotunities in the oil industry, from Westerners to Asian communities. This swamps the local population. </span>
The answer is Pennsylvanian. I worked on this before. The Pennsylvanian era is a subperiod of the Carboniferous Period. i really hope this helps :)
The NAFTA (North American Free Trade Agreement) is the agreement that has lowered trade barriers between Mexico and the rest of North America. It was signed January 1, 1994.
The answer is A. Hope it helps ^^
