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12 votes
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Can I use diamonds as fossil fuel?

Diamonds are expensive. Really expensive. Even "cheap" synthetic diamonds are orders of magnitude more expensive than conventional fossil fuel. By using them as fuel, you will increase ...
Gimelist's user avatar
  • 23.1k
9 votes
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How much does overpopulation affect the carbon dioxide concentration in the air in terms of just breathing?

Human and animal respiration has no global warming impacts. The CO2 released by respiration is in balance with the CO2 absorbed by the plants that became the foods that were the source of the CO2 ...
Ken Fabian's user avatar
  • 2,120
8 votes
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Why is there so much more silicon than carbon in the Earth's crust?

So where did it go? Carbon was never there (or here) to begin with. You need to look at this from the opposite way. By asking "where did it go" you assuming the Earth was here first, with carbon, and ...
Gimelist's user avatar
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7 votes

Is $\ce{CO_2}$ in photosynthesis the only way for carbon to become organic?

The answer is no. One important mechanism that also fixes carbon is chemosynthesis. One good example of this production is around hydrothermal vents in the bottom of the ocean. Chemosynthesis is the ...
arkaia's user avatar
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7 votes

Why is more carbon in the atmosphere good, up to a certain level?

If plants were growing poorly when atmospheric CO2 was 200ppm, it was probably because Earth was in the middle of an ice age and covered with glaciers, not because plants were starved of carbon ...
jeffronicus's user avatar
  • 3,487
6 votes
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Would home heat pumps provide large benefits against climate change?

The values on the DEFRA table with the column heading $ kg\ \ce{N2O} $ already include the global warming potential (GWP) factor of 298, as indicated by a note on the column heading (looking at ...
LShaver's user avatar
  • 1,410
6 votes
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If methane decays to $\small\sf{CO_2}$ in the atmosphere, shouldn't there be much more $\small\sf{CO_2}$?

So what am I missing in this analysis? The linked data says 2017 CH4 was about 1850 ppb, not 1850 ppm. Dividing parts per billion (ppb) by 1000 results in parts per million (ppm). In other words, ...
David Hammen's user avatar
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5 votes
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Does organic decay release the same CO2 as burning?

I can't quantify the answer, but intuitively, nearly all of a burning tree's carbon is converted to $\small\mathsf{CO_2}$ - assuming the fire is hot enough. You are correct in assuming that termites ...
Gordon Stanger's user avatar
5 votes
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In an Earth-like planet with no history of carbon-based life forms, would there be limestone?

I'd have to say, yes. Once life evolved in the world's oceans, the vast majority of limestone formation has been through the organic process. However, before life did evolve, limestone formed through ...
BillDOe's user avatar
  • 2,187
4 votes

Is Radiocarbon dating flawed?

I will preface this by saying that I am not particularly familiar with radiocarbon dating techniques, and therefore the minutiae are somewhat lost on me. However, as someone who works with several ...
desander's user avatar
  • 415
4 votes

But what exactly is "black carbon" in the context of snow-melting particulates reaching Antarctica?

This issue has been extensively studied and identified. A Google search regarding the particle size of black carbon will yield a plethora of information. Chemically, black carbon (BC) is a component ...
Thomas Perry's user avatar
4 votes
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How do you convert the μmol/mol units for atmospheric CO2 into CO2 mass fraction?

TL;DR: Multiply $\ce{CO_2}$ expressed in μmol/mol by 1.52 the μg/g equivalent. Details: The molecular mass of $\ce{CO_2}$ is 44.01 g/mol. The standard molecular mass of dry air is 28.9647 g/mol. ...
David Hammen's user avatar
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3 votes

Why is carbon dioxide a more important greenhouse gas than nitrous oxide?

Two things to think about: Nitrous oxide is extremely scarce in the atmosphere, less than 1 ppm. Compare with carbon dioxide that (unfortunately) is now greater than 400 ppm. Also consider the ...
Gimelist's user avatar
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3 votes
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Can a person's individual carbon emissions become negative over their lifetime?

Aussies emit ~15 tonnes CO2 per capita per year. Current carbon capture and storage technology can bury CO2 for \$40-\$57 per tonne (estimate for early 2020s). So, yes, you could do this for ~$50,000 ....
Keith McClary's user avatar
3 votes

Is $\ce{CO_2}$ in photosynthesis the only way for carbon to become organic?

In addition to chemosynthesis by living organisms, carbon dioxide can be reduced to methane and more complex hydrocarbons by serpentization. Serpentization is a high-temperature, high-pressure ...
Oscar Lanzi's user avatar
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3 votes

If a person uses public transport, how much carbon is added to the footprint?

I'm no expert on such subjects, but did Google and immediately this Guardian article offering a dataset apparently attributed to Camden Council/travelfootprint.org/Clear Zone Partnership. There are a ...
JeopardyTempest's user avatar
3 votes

How much net carbon can coral sequester?

Corals usually grow 1cm every year, some as slow as 2mm, some faster. Coral sand density is about 1.5g /cm2, it's not the best estimate of coral weight. So, a coral organism of 10cm^2 produces 150 ...
bandybabboon's user avatar
  • 1,349
3 votes

In an Earth-like planet with no history of carbon-based life forms, would there be limestone?

In an Earth-like planet with no history of carbon-based life forms, would there be limestone? Short answer: Maybe. The form of carbon in limestone is oxidised carbon: carbonate: CO32-. This is ...
Gimelist's user avatar
  • 23.1k
3 votes
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Will photosynthesis based carbon sequestration always be more efficient than other chemical means - in terms of rate?

Rate.. no. Brute Force We can treat this as an industrial chemistry question. The brute-force method for carbon sequesteration is simply: Extract CO2 from the air (using the acid/base chemistry, ...
Andrew Jon Dodds's user avatar
3 votes

Does organic decay release the same CO2 as burning?

When a forest is used for sustainable fuel, there is a range of age classes in the forest, some old, some middle aged and so on. Wood harvest takes the oldest trees leaving young trees to take their ...
Thomas Young's user avatar
3 votes

Does organic decay release the same CO2 as burning?

The key word in your query is the word "essentially". Termites and bacteria die too. So whatever carbon was initially converted from the tree into termites or bacteria ends up mostly going to $\small\...
MaxW's user avatar
  • 511
3 votes
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Looking for details on data presented in IPCC AR6 WG1 report

Oh dear, I agree that this is a poorly explained figure. Let's look at the caption: Yellow arrows represent annual carbon fluxes (in PgC yr–1) associated with the natural carbon cycle, estimated for ...
Deditos's user avatar
  • 3,950
3 votes

What is the current atmospheric concentration of $\small\sf{CO_2}$ in the atmosphere in atm (or bar)?

What I think you are asking for is the partial pressure of carbon dioxide in the atmosphere. The partial pressure of carbon dioxide can be determined, where, $P_{CO_2} \ = \ x_{CO_2}\cdot P_{atm}$ One ...
Fred's user avatar
  • 24.7k
3 votes

What is the current atmospheric concentration of $\small\sf{CO_2}$ in the atmosphere in atm (or bar)?

Not nearly so elegant as @fred answer: 400 ppm = 0.04% , then CO 2 is 0,04 % or 0.0004 atm.
blacksmith37's user avatar
  • 1,043
2 votes

How do I calculate Per capita $\ce{CO2}$ emissions?

If Canada produced 0.55 (Gt) of $\ce{CO2}$ emissions from 34 million people in 2010, the per capita emissions is indeed $1.6\times10^{-8}$ Gt of $\ce{CO2}$ per person per year. This is equivalent to ...
f.thorpe's user avatar
  • 13.7k
2 votes

Does organic decay release the same CO2 as burning?

If organic matter is buried - such as in landfill - it will decay anaerobically, resulting in $\small\mathsf{CH_4}$ (methane) rather than $\small\mathsf{CO_2}$ (Carbon dioxide). Methane is about 30 ...
Tomajar's user avatar
  • 21
2 votes

Will photosynthesis based carbon sequestration always be more efficient than other chemical means - in terms of rate?

Photosynthesis is up to about 2% efficient while solar panels are above 20% efficient. So just based on the energy available per unit area of sunlit land or sea, chemical carbon sequestration holds ...
Chris Jenks's user avatar
2 votes

Why is carbon dioxide a more important greenhouse gas than nitrous oxide?

Specifically regarding the table in your question, the last column compares the emissions not by mass but by CO2-Eqivalent mass. That means that the number already takes into account that the global ...
uUnwY's user avatar
  • 268
2 votes

Why is carbon dioxide a more important greenhouse gas than nitrous oxide?

There isn't enough nitrous oxide in the atmosphere to make a major contribution to global warming, which in some ways is a pity, because we'd all bee in a much jollier mood if there was (N2O is ...
Michael Walsby's user avatar

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