Sand can be used for glass.
The name given to the loose organization of people dedicated to helping escaped slaves get to free territory was the "Under Ground Railroad." Hope this answer helped!
The aim of bantustan was to ensure segregation worked as much as possible.
These were territory set aside for black inhabitants of South Africa and Namibia as part of the policy of apartheid. It involved concentrating the members of designated ethnic groups, thus
making each of those territories ethnically homogeneous.