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== Card #11: Concentration of CO₂ == ...rbon sinks. The other half remains in the atmosphere. The concentration of CO₂

...₂ dissolves in the ocean, it turns into acid ions (H₂CO₃ and HCO_3-). This makes the oceans more acidic and th ...ictly speaking a consequence of climate change, but another consequence of CO₂ emissions.

.../sup> + 2HCO₃^- ⇔ CaCO₃ + H₂O + CO₂ ...>3</sub> ⇔ H⁺ + HCO₃^- ⇔ 2 H⁺ + CO₃^2-.

== Card #7: CO₂ emissions == CO₂, or carbon dioxide, is the main anthropogenic (produced by huma

Half of the CO₂ we emit every year is absorbed by carbon sinks: ...ery year, the CO₂ emitted by humankind has to go somewhere. Any CO₂ that is not absorbed by the other carbon sinks remains in the a

* [[En-en adult card 11 concentration of co2|Concentration of CO₂ (ppm)]] ...a small puzzle, the association between [[En-en adult card 7 co2 emissions|CO₂ emissions]] and [[En-en adult card 12 carbon sinks|carbon sinks

*Part of the CO₂ will be absorbed by carbon sinks, in particular the oceans. Thi ...b> if there is more of it in the air) stays in the atmosphere. Half of the CO₂ stays in the atmosphere, taking its concentration from 280 ppm

CO₂ is not the only greenhouse gas (GHG). Among others are methane .../sub> equivalent). This allows us to equate the emissions of other GHGs to CO₂ emissions on a comparable basis. We then define the Global Warm

...ity in France]</ref>). Therefore, an electric car in France will emit less CO₂ than a fossil fuel car, but in the calculation of emissions per ...ef>https://co2.myclimate.org/en/portfolios?calculation_id=4877644</ref> of CO₂, which is almost the annual amount of carbon that the average p

...ng to melt, releasing into the atmosphere previously locked-in methane and CO₂ from decomposed biomass. This creates a negative feedback loop, ...n to the bacteria and plankton present in the sea, which degrade them into CO₂ (in the water layers near the surface) and methane (CH<sub>4</s

...n to the bacteria and plankton present in the sea, which degrade them into CO₂ (in the water layers near the surface) and methane (CH<sub>4</s

*[[En-en adult card 7 co2 emissions|CO₂ emissions]]

...(CaCO₃) has to be burnt, resulting in lime (CaO) and releasing CO₂ into the atmosphere.

...inks|Carbon sinks]] Studies have shown that yields increase with increased CO₂, but that the nutrient content of vegetables is reduced. Indeed

..., as it heats up, the water will lose its capacity to dissolve atmospheric CO₂ and will become less efficient as a carbon sink. So the increas

...orestation is not so much that it destroys carbon sinks, but that it emits CO₂ that took decades or centuries to capture. It's a question of f ...forested, this does not impact carbon sinks. On the other hand, the amount CO₂ released is very high.

...net would be 33°C colder and life as we know it would not be possible. But CO₂ and other GHGs related to human activities amplify the greenhou

Agriculture does not emit much CO₂ but does emit large quantities of methane (from cattle and rice ...ty to sequester carbon by even 0,4%, we would have a significant impact on CO₂).

...When we burn fossil fuels, a perfect and complete combustion produces only CO₂ and water vapour. However, the hydrocarbons we burn are not pur

...sene to propel themselves. This combustion, like all combustions, releases CO₂ and water vapour. Water vapour is usually not counted in the ca ...le organic compounds (VOCs), methane (CH₄) and carbon monoxide (CO).