evidence: The melting of Arctic sea ice is already causing a rush for Arctic riches, such as faster shipping routes among northern countries and access to minerals, oil, and other resources of the Arctic Ocean. By themselves, these things would seem to be beneficial to the global economy. But the key words are "by themselves," because they don’t occur in isolation. Instead, they are consequences of having less sea ice, and that appears to be a very detrimental development on at least two levels. [...] The bottom line is that the melting of Arctic ice essentially is yet another unprecedented "experiment" on our planet. While there’s always a small chance that this experiment will result in more pros than cons, it seems a highly dangerous experiment to conduct.