We need to act urgently to reduce the amount of greenhouse gas pollution we humans create in order to slow down and eventually stop climate change. In the mean time we see case after case of something happening that seems unusual and that seems linked to global warming. We need not wait for the jury to return a verdict in every single case in order to act. We already know what many of the effects of climate change are, and we have a reasonably good idea of what effects will arise in the future. Even so, every now and then something happens that any reasonable person might guess is linked…