Im confused what is so interesting about this. The Greenland Ice Core Project tracked ancient pollution in snow 20+ years ago, and they even discovered interest

Im confused what is so interesting about this. The Greenland Ice Core Project tracked ancient pollution in snow 20+ years ago, and they even discovered interesting spikes all the way back to the Roman Empire [1] https://en.wikipedia.org/wiki/Greenland_ice_core_project https://en.wikipedia.org/wiki/Greenland_ice_core_project