The spirit of the Earth, Gaia, summons five teenagers to join her in battling ecological destruction and pollution. Their first fight is to keep Hoggish Greedly's oil rig from destroying a coastline.

Greedly and Rigger strip-mine Thailand for rubies.

Greedly and Rigger plot to empty the oceans of fish.

A fishing village is taught a lesson about the coral reef when Hoggish Greedly shows up. He uses dynamite fishing as a cover to rip off the coral reef remains with his new Reef Ripper. The villagers don't see this, as they are now being well fed by a plentiful, but quickly disappearing fish supply. When shown the devastating effects of pounding waves against a neighboring island village, the villagers ask the Planeteers to help stop Greedly. Captain Planet finds a creative way to recycle, and help start a new reef....