4 ms·

Ice cores: https://www.methanelevels.org/#sources https://www.methanelevels.org/#sources

• djfobbz 3y ago
  Though scientific, it's still a guesstimate and not factual data.
  • barbazoo 3y ago
    > Changes in past atmospheric methane concentrations are determined by measuring the composition of air trapped in ice cores from Antarctica. measurement, not "guesstimate"
  • itishappy 3y ago
    Right, like every measurement humanity has ever made.
  • deleted 3y ago
    [deleted]