The need to take global warming seriously is not slam-dunk obvious to most people. In my own case, over time I have slowly became convinced that there was an emerging consensus among scientists studying the issue that planetary warming was a serious matter. Like most people, I do not have the time or the expertise to have studied the question in detail, but I have enough respect for the scientific process and the way that scientists make collective judgments as a community that when I see a scientific consensus emerging on anything, I tend to take it seriously. In fact the global warming issue is a great example of seeing, before our very eyes, a transition in science from a pre-paradigmatic state to a paradigmatic state.
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