This might be a stupid question, I might indeed be stupid. But what is the actual process going on inside my body at 290lbs when I go hiking for example?
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The food you eat (and store as fat) are made of hydrocarbons. Chemicals made primarily of carbon, oxygen, and hydrogen.
When you breathe, you inhale oxygen (O2) and exhale carbon dioxide (CO2). The oxygen is like a little magnet when you hold it near those hydrocarbons (in your food and fat) it grabs onto the carbon (creating carbon dioxide) and hydrogen (creating water), releasing energy.
So you literally exhale the carbon and urinate/sweat the hydrogen and oxygen from those hydrocarbons.
And the opposite is true for plants. Their plant matter is made based on carbon they breathe in from the air.
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