
Rebecca Solnit: We Are Firefighters: A Talk About the Climate and the Trees
… Breath by breath from our first to the last we take this atmosphere, this sky into where our lungs separate out the oxygen and our hearts send it coursing through our bodies and we exhale the rest, the nitrogen and the carbon dioxide. We think we are solids, but we are two thirds liquid, and survive through taking these sips of sky into our lungs.
Trees on the other hand, take in the carbon dioxide, making their bodies of it or sending it into the ground, and excrete oxygen, so the breaths each and all of us are taking in at this very moment are full of oxygen released into the atmosphere by plants, dating back to the origins of life and the blue-green algae that radically changed the composition of the atmosphere by giving it this oxygen. Then came billions of years in which plants pulled carbon dioxide out of the earth and buried it in the ground, where some of over the ages became coal, became petroleum, became the methane marketed as natural gas.
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