Progressives should know the disinformers’ most commonly used arguments — and how to answer them crisply. Those arguments have been repeated so many times by the fossil-fuel-funded disinformation campaign that almost everyone has heard them — and that means you’ll have to deal with them in almost any setting, from a public talk to a dinner party.
You should also know as much of the science behind those rebuttals as possible, and a great place to start is SkepticalScience.com.
BUT most of the time your best response is to give the pithiest response possible, and then refer people to a specific website that has a more detailed scientific explanation with links to the original science. That’s because usually those you are talking to are rarely in a position to adjudicate scientific arguments. Indeed, they would probably tune out. Also, unless you know the science cold, you are as likely as not to make a misstatement.
Physicist John Cook has done us a great service by posting good one-line responses and then updating them as the science evolves and as people offer better ways of phrasing. Below I have reposted the top 99 with links to the science. You can find even more here. Everybody should know the first 20 or so.
For instance, if somebody raises the standard talking point (#1 on the list) that the “climate’s changed before,” you can say, “Climate reacts to whatever forces it to change at the time; humans are now the dominant forcing.” That is actually quite similar to what was my standard response, “The climate changes when it is forced to change, and now humans are forcing it to change far more rapidly than it did in the past” (see “Humans boosting CO2 14,000 times faster than nature, overwhelming slow negative feedbacks” and “New Science Study Confirms ‘Hockey Stick’: The Rate Of Warming Since 1900 Is 50 Times Greater Than The Rate Of Cooling In Previous 5000 Years“). Working in the “humans are now the dominant forcing” part is a good idea.
Cook explains the origin of these one-liners in a 2010 post, “Rebutting skeptic arguments in a single line.” I have included the longer ‘paragraph’ rebuttals, which any CP reader who plans to speak out on this subject — in public or just with friends and associates — should also be familiar with.
Skeptic Rebuttal One Liners, click the link below.

http://thinkprogress.org/climate/2013/05/07/1972581/99-one-liners-rebutting-denier-talking-points-with-links-to-the-full-climate-science/

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