1. dams built along the rivers have caused problems for people living further downstream because a. dams are expensive to build b. a river can only be dammed in one place along its path. c. no fish can live in the rivers after they have been dammed d. less water comes down the river to those people once the dam is built. 2. dams built along the rivers have caused problems for people living further downstream because a. desert b. grasslands c. inland lakes d. rich farming areas.