Aelement like silicon is not usually used to make wires or pans because it

Silicon is not a very good conductor, it's a "semi-conductor", meaning that it only would work certain times on and off and costs much more than just copper wire. Manufactureres of pans don't make it because of the costly reason.

yellow fever and other tropical diseases

barrio is a spanish word meaning neighborhood. in spain, several latin american countries and the philippines, the term is also used officially to denote a division of a municipality while a ghetto is a part of a city in which members of a minority group live, typically as a result of social, legal, or economic pressure. the term may have originally been used in venice to describe the part of the city to which jews were restricted and segregated.