Why Do We Need Plants To Live

This video, https://www.youtube.com/watch?v=If7cRPV7gek, can also be seen at https://www.youtube.com/playlist?list=PLKTjY73tu_1-4xIuz7BMceJc8yHvd0qsH.

See the rest of the story at http://cacheservice.christopherkober.com/why-do-we-need-plants-to-live/

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