11.   The narrow gorge was dubbed Hellgate because it posed a major challenge to loggers of yesteryear who used the river to move their logs to downstream pickup points.

12.   The proposed plants, most of which would use the river for some part of their operation, are early in the approval process.

13.   The scale of the problem is seen at Sheikpur village, barely one mile east of Jajmau, where villagers have used the river since ancient times.

14.   Until then everybody just used the river, but that was a problem at night.

15.   We passed a high-stepping horse pulling a couple in a sleigh, who were also using the river as a road.

16.   Poor rural Haitians use rivers for bathing and as toilets.

17.   Both rivers were used to designate the U.S.-Canadian border, but both have changed course over the years.

18.   Costa Rica, which abolished its army five decades ago, used the river to supply its border posts.

19.   Down the valley in Rio Abajo, Aymara Indian farmers use the river for cooking, drinking water and irrigating their crops.

20.   They would also use rivers to get around rugged mountains in northwestern Guyana.