# Differences

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co2fromcars [2012/01/25 09:08] mike |
co2fromcars [2012/01/25 09:21] mike |
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- | The atmosphere is currently at 387ppm <math>CO_2</math>. 407ppm is considered unprecedented (+20ppm). How much atmosphere is required to dilute this CO_2? | + | The atmosphere is currently at 387ppm <math>CO_2</math>. 407ppm is considered unprecedented (+20ppm). How much atmosphere is required to dilute this <math>CO_2</math>? |

<math> 1216.03 L \; CO_2 \times \frac{1,000,000L}{20L} </math> | <math> 1216.03 L \; CO_2 \times \frac{1,000,000L}{20L} </math> | ||

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The atmosphere is 120km high, but realistically, the density drops off to zero out there, so we can half that to get a reasonable number for a "dense" atmosphere. Assuming an atmosphere of uniform density and an altitude of 60km, what percentage of a square km is this? | The atmosphere is 120km high, but realistically, the density drops off to zero out there, so we can half that to get a reasonable number for a "dense" atmosphere. Assuming an atmosphere of uniform density and an altitude of 60km, what percentage of a square km is this? | ||

- | Volume of the atmosphere: | + | Volume of 1 square km of atmosphere: |

<math> 60km \: \times \: 1km\times \: 1km </math> | <math> 60km \: \times \: 1km\times \: 1km </math> |