<p>It went into:</p>

<h1>Limestone</h1>

<p><a href="https://i.sstatic.net/VuuDU.jpg" rel="noreferrer"><img src="https://i.sstatic.net/VuuDU.jpg" alt="enter image description here"></a></p>

<p>Mostly made out of calcium carbonate (Ca<strong>C</strong>O<sub>3</sub>)</p>

<h1>Coal</h1>

<p><a href="https://i.sstatic.net/w6vWo.jpg" rel="noreferrer"><img src="https://i.sstatic.net/w6vWo.jpg" alt="enter image description here"></a></p>

<h1>Oil and gas</h1>

<p><a href="https://i.sstatic.net/09v64.jpg" rel="noreferrer"><img src="https://i.sstatic.net/09v64.jpg" alt="enter image description here"></a></p>

<h1>Living biomass</h1>

<p><a href="https://i.sstatic.net/RwJjC.jpg" rel="noreferrer"><img src="https://i.sstatic.net/RwJjC.jpg" alt="enter image description here"></a></p>

<h1>Subducted into the mantle</h1>

<p>Occasionally coming back as diamonds</p>

<p><a href="https://i.sstatic.net/SFf90.png" rel="noreferrer"><img src="https://i.sstatic.net/SFf90.png" alt="enter image description here"></a></p>

<p>Or as volcanic gas</p>

<p><a href="https://i.sstatic.net/gqKIl.jpg" rel="noreferrer"><img src="https://i.sstatic.net/gqKIl.jpg" alt="enter image description here"></a></p>

<hr>

<p>All images public domain from <a href="https://pxhere.com/" rel="noreferrer">here</a></p>

CC BY-SA 4.0
2019-04-22T10:40:52.373Z
2019-04-22T10:40:52.373Z
Gimelist
<p>Oxygen gas began to appear on the earth surface about 2 billion years ago by photosynthesis. Carbon Dioxide was converted into carbohydrates in the process. Where did these carbohydrates go?</p>
<p>If they were converted into coal, oil, and natural gas over millions of years, then by releasing them back to the atmosphere in a couple of hundred years by combustion, we are definitely changing the atmospheric composition. This will definitely change the climate. This argument for climate change seems easy to understand and bulletproof. However, I have not heard this argument mentioned by the media. Why?</p>

CC BY-SA 4.0
2019-04-22T02:45:12.523Z
In short, over millions of years living organisms converted it into coal & calcium carbonate (limestone) deposits.
Fred
CC BY-SA 4.0
2024-05-10T08:44:43.283Z
Is it true that the earth is greener today? If so, there is more photosynthesis to absorb the CO2 from the air that humans produce. How can we know if it is enough?
Federico Robinson
<atmosphere><climate-change><paleoclimatology>
3 Billion years ago, the earth was covered with Carbon Dioxide. Where did it go?
Harris
# 3 Billion years ago, the earth was covered with Carbon Dioxide. Where did it go?

(Asked by: username_0 on 2019-04-21)

Oxygen gas began to appear on the earth surface about 2 billion years ago by photosynthesis. Carbon Dioxide was converted into carbohydrates in the process. Where did these carbohydrates go?

If they were converted into coal, oil, and natural gas over millions of years, then by releasing them back to the atmosphere in a couple of hundred years by combustion, we are definitely changing the atmospheric composition. This will definitely change the climate. This argument for climate change seems easy to understand and bulletproof. However, I have not heard this argument mentioned by the media. Why?

**Tags:** atmosphere, climate-change, paleoclimatology

> **Comments:**
> **username_1**: In short, over millions of years living organisms converted it into coal & calcium carbonate (limestone) deposits.  
> **username_2**: Is it true that the earth is greener today? If so, there is more photosynthesis to absorb the CO2 from the air that humans produce. How can we know if it is enough?  

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## 1 answers

### Answer by username_3 on 2019-04-22. Score: 8

It went into:

# Limestone

[![enter image description here](https://i.sstatic.net/VuuDU.jpg)](https://i.sstatic.net/VuuDU.jpg)

Mostly made out of calcium carbonate (Ca**C**O3)

# Coal

[![enter image description here](https://i.sstatic.net/w6vWo.jpg)](https://i.sstatic.net/w6vWo.jpg)

# Oil and gas

[![enter image description here](https://i.sstatic.net/09v64.jpg)](https://i.sstatic.net/09v64.jpg)

# Living biomass

[![enter image description here](https://i.sstatic.net/RwJjC.jpg)](https://i.sstatic.net/RwJjC.jpg)

# Subducted into the mantle

Occasionally coming back as diamonds

[![enter image description here](https://i.sstatic.net/SFf90.png)](https://i.sstatic.net/SFf90.png)

Or as volcanic gas

[![enter image description here](https://i.sstatic.net/gqKIl.jpg)](https://i.sstatic.net/gqKIl.jpg)

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All images public domain from [here](https://pxhere.com/)


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