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Change is a constant of life. The natural cycles that balance and regulate our Earth and atmosphere provide the necessary conditions for sustaining a diverse range of life forms on the planet. But what actually occurs in these cycles? The Cycles Collection looks at the critical role the carbon, nitrogen, phosphorous and water cycles play in the life of plants, animals, bacteria and our planet. This motion-graphics driven program simply yet clearly explains the key stages and processes o f each cycle and why the cycles are so important to all life on our planet. An ideal resource for viewers seeking a scientific understanding of these cycles.