1  2  3  4 

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4  _  _  _  _


ACROSS
1)  a cloud of fine particles suspended in a gas
2)  a slow pace of running
3)  a laborer who is obliged to do menial work
4)  the capital and largest city of yemen; on the central plateau


DOWN
1)  protocol that allows users to copy files between their local system and any system they can reach on the network
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  the natural satellite of the earth
4)  an inactive volcano in sicily; last erupted in 1961; the highest volcano in europe (10,500 feet)

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