Captain Planet and the Planeteers (1990)

Season 3: Episode 6

When visiting Skyrunner (from "Stardust"), the Planeteers come across a faulty irrigation project, engineered by Looten Plunder, who has manipulated the Tribe into allowing him to put the project into effect. Blinded by promises of riches, new jobs, and a good harvest, the Tribe must be convinced by the Planeteers that the project is more destructive than productive, before Plunder drains them of their water, and thier livelihood.