The Planeteers talk about pollution in rivers and its negative effects on the environment and animals.

Greedly lets all the oil spill into the ocean. Captain Planet helps the planeteers to stop Greedly by sucking the oil back.

It is discovered that Sly Sludge has been using the active volcano of an Island inhabited by people as a natural trash incinerator. The volcano begins erupting and trash that the volcano didn't erupted with it, scattering. Captain Planet tries to enter the volcano, but the fumes from the trash made the air inside the volcano too polluted for him to tolerate.

Gaia tells viewers how we can reduce air pollution.

The Planeteers explain why it is wrong to dump waste into the oceans and its effect on the environment and wildlife. They also explain how to reduce water pollution.