Yes the Earth is alive! In this video released by NASA it shows the Earth "breathing".
If you jump to 1 minute in the video you can see how the Earth's CO2 levels change per month and how the vegetation changes. Notice in winter the CO2 (orange) levels in the northern hemisphere are high. Then springs comes and the vegetation (green) starts to grow. That vegetation needs CO2 to live and "sucks it" right up.
Without this cycle Earth would not be able to support life and without it we would not be here.
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