Carbon dioxide

| Subject classification: this is a chemistry resource.

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| Educational level: this is a research resource.

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## Discovery

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Carbon dioxide was discovered by Joseph Black, a Scottish chemist and physician, in 1754.

## Quick Facts

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Name: Carbon Dioxide
Chemical Formula: CO2
Melting Point: 194.7 K (-78°C, -109 °F) (Sublimes)
Boiling Point: 216.6 K (-57°C, -70°F) (Sublimes)
Appearance: Colourless gas
Molar Mass: 44.010 g/mol

## Discussion questions and essay ideas

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* What role does carbon dioxide play in climate change on Earth?
* What is the evidence that points to carbon dioxide emissions playing a significant role in climate change on Earth?

## Carbon dioxide and climate change

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Increases in atmospheric concentrations of carbon dioxide (CO2) and other long-lived greenhouse gases such as methane, nitrous oxide and ozone have strengthened their absorption and emission of infrared radiation, causing the rise in average global temperature since the mid-20th century. Carbon dioxide is of greatest concern because it exerts a larger overall warming influence than all of these other gases combined.[1]

### Educational readings

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#### Wikipedia

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As noted above, "Carbon dioxide is of greatest concern [of the various greenhouse gases] because it exerts a larger overall warming influence than all of these other gases combined."

* List of countries by carbon dioxide emissions
* Top contributors to greenhouse gas emissions
* Greenhouse gas emissions by the United States
* List of U.S. states and territories by carbon dioxide emissions
* Greenhouse gas emissions by China
* List of countries by greenhouse gas emissions
* List of countries by carbon dioxide emissions per capita
* List of countries by greenhouse gas emissions per person
* Life-cycle greenhouse gas emissions of energy sources
* Carbon dioxide in Earth's atmosphere
* List of U.S. states and territories by carbon dioxide emissions

#### External

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* Just 100 companies responsible for 71% of global emissions, study says
* Sources of carbon dioxide emissions

## See also

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* Climate change

## References

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1. ↑ "The NOAA Annual Greenhouse Gas Index (AGGI) – An Introduction". NOAA Global Monitoring Laboratory/Earth System Research Laboratories. Archived from the original on 27 November 2020. Retrieved 2020-12-18.