Complex sentence: As Bradford's population grew with the textile industry in the early 19th century most human waste and industrial effluent drained into Bradford beck, then to the canal basin and on to the river Aire flowing past Esholt.
Split into simpler sentences: As Bradford's population grew with the textile industry in the early 19th century. Most human waste and industrial effluent drained into Bradford beck, then to the canal basin and on to the river Aire flowing past Esholt.