The climate when the Harappans landed in Kutch must have been similar to the current semi-arid conditions, the parched land indicating that their interests in colonising it should have been other than agrarian, according to Bisht. They might also have cultivated cotton or other cash crops for domestic and international markets. Or, they might have been involved in lucrative livestock farming. Though mineral resources in Kutch were scarce, the presence of chalcedony, ochre, white clay, Fuller's earth, agate, jasper, salt and gypsum might have led them into mining and manufacturing these for export. Researchers also believe there must have been a navigable sheet of water or deep meandering channels in the Rann which the sea-faring Harappans exploited, though there are no traces of these water routes now. "Otherwise, the location of a city of enormous dimensions would remain a big enigma," notes Bisht.