This is one of those series, which I've watched, because of the theme song. Because I'm a big JAM Project fan, I've heard the opening song of the series earlier, than I learned about this series. When I listened to the song, I felt like I have to watch this series, because this is the GREATEST Endoh Masaaki song EVER! I know many of his songs, so trust me.

About the series: It's about the Suzuki family, one day the son finds a strange vase, which he finds interesting, so he brings it home. Because the whole family finds it interesting, they keep it. But they don't know, that's a kind of gangway for the Eco Crushers to the real world. Their goal is to destroy the Earth with the environmental pollution. Thanks to this vase they have some kind of contact with the family, and when the family would do something which is against the environment, they just appear and encourage them to do it. The family is scared from them, but no worries, because the super sentai Kankyou Choujin Ecogainder appears and they defeat the Eco Chushers, who always learn a lesson about how to behave.
Fun fact: The last episode is also strongly referred to JAM Project. :) I considered that as a easter egg.

This is the story in nutshell. As you could read, nothing serious, it's been created for children to learn to live environmental friendly. But it's cute and worth to watch for anyone. And once more: The opening song is awesome!