CO2 from our breath is carbon neutral, meaning that it releases carbon that was already in the atmosphere only a short time ago.
The carbon we exhale comes from our food. So that carbon was part of a plant not that long ago (a few years, at the most). And the plant got that carbon from the atmosphere. So there's no net change in CO2 from that.
I'm not sure where the carbon dioxide in soda comes from. Probably from the atmosphere, so it would be carbon neutral as well.
The same applies to burning wood or other biomass. It's carbon neutral. (Of course it releases smoke and particulates that are harmful in other ways)
CO2 from fossil fuels has been stored underground for many millions of years, and it took a long time to form in the fist place. So when we burn coal or oil, we're releasing, in a few years, amounts of carbon that took millions of years to remove from the atmosphere.
The carbon we exhale comes from our food. So that carbon was part of a plant not that long ago (a few years, at the most). And the plant got that carbon from the atmosphere. So there's no net change in CO2 from that.
I'm not sure where the carbon dioxide in soda comes from. Probably from the atmosphere, so it would be carbon neutral as well.
The same applies to burning wood or other biomass. It's carbon neutral. (Of course it releases smoke and particulates that are harmful in other ways)
CO2 from fossil fuels has been stored underground for many millions of years, and it took a long time to form in the fist place. So when we burn coal or oil, we're releasing, in a few years, amounts of carbon that took millions of years to remove from the atmosphere.
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