Oil helped spark the creation of motorized vehicles that ran on gass. Thanks to oil we have had advances in spatial exploration and fast traveling.
Before the unification of Nepal was badly running, without good political issues and visions. Nepal faced domestic war and conflict, most of the people died.
Prior to the unification of Nepal, Nepal consisted of small kingdoms, and Darbar Square is the most prominent remnant of these ancient kingdoms of Nepal.
Industrial cities began to develop because of new technologies and ideas and in order for the factories to grow larger, they needed more workers so the the unemployed people had those opportunities to work there.
The ten most populous countries in North America are: United States: 321.2 million. Mexico: 121 million. Canada: 35.8 million.