One constant refrain from the usual suspects goes that the climate has always changed, so why worry about it now? There are a lot of answers to that. My favorite is to ask them, since smoking has been causing cancer for millennia, why worry about your kids smoking now? Regardless, like most instances of fraudulent pseudo-science, there’s an element of truth to the climate’s-always-been-changing refrain, and that’s why it’s deployed by fossil fuel apologists.
A new study has found that climate has indeed been changing for a long time, on human timescales anyway, and concludes that some of those longer term trends are attributable to human activity.
http://www.dailykos.com/stories/2016/8/26/1564003/-Humans-have-affected-climate-for-longer-than-previously-thought
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