Mexico and Canada on opposite sides.
The big five factors of poverty (as a social problem) include: ignorance, disease, apathy, dishonesty and dependency. These, in turn, contribute to secondary factors such as lack of markets, poor infrastructure, poor leadership, bad governance, under-employment, lack of skills, lack of capital, and others.
Hope it helps!!!
There are more than one city on the High planes in Texas, and some of them are: Armadillo (190 000 people), Lubbock (270 000 or 315 000 with suburbs - it's also among the 100 most populous cities in the US!, but only 11th in Texas.), Pecos (10 000) , Odessa (110 000 )<span />