How to Talk to a Climate Skeptic: Responses to the most common skeptical arguments on global warming

Talking to climate change deniers and skeptics can tricky. Here are handy responses to some of the most frequent arguments climate deniers use.
In This Series
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‘Climate scientists dodge the subject of water vapor’–No, they really don’t
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Climate scientists never talk about…
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‘We are just recovering from the LIA’–Why should we expect this to happen?
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Today's warming is just a…
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‘The CO2 rise is natural’–No skeptical argument has been more definitively disproven
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: It's clear from ice cores…
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‘Natural emissions dwarf human emissions’–But emissions are only one side of the equation
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: According to the IPCC,…
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‘Climate is always changing’–That doesn’t mean it isn’t different today
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Climate has always changed. Why…
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‘The null hypothesis says warming is natural’–An inappropriate test, and one that would fail anyway
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Natural variability is the…
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‘Volcanoes emit more CO2 than humans’–Not even close …
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: One decent-sized volcanic eruption puts…
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‘Mars and Pluto are warming too’–No they aren’t — and what if they were?
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Global warming is happening on…
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‘Global warming is part of a natural cycle’–This idea is one short step above appealing to magic
(Part of the How to Talk to a Global Warming Skeptic guide) Objection: Current warming is just part…