"The Arctic will retain its power to amaze for a long time. Yet it is now changing beyond the usual regional and annual variations in sea-ice formation, glacier melt and so forth. The Arctic is clearly melting. Its floating ice cap is shrinking and thinning and its glaciers are retreating. By the end of this century, maybe much sooner, there will be frequent Arctic summers with almost no sea...
Grazing Cattle Reduce Some Greenhouse Gases
"Carbon dioxide gets most of the attention in conversations about climate change, but there are other molecules that deserve some of the blame for the earth's rising temperature, including methane, which a study a few weeks ago reported was bubbling up from the Arctic seafloor.
Now a new report published on Wednesday in Nature addresses the impact of another greenhouse gas: nitrous oxide, or N2O, which is about 300 times as powerful as CO2 at trapping heat in the atmosphere. As with CO2, atmospheric concentrations of N2O have been boosted by human activity, mostly agricultural, by about 16% since the Industrial Revolution began."
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