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You will have to update your cartoon regarding refrigerants. R134a is already out as an automotive refrigerant, replaced by the highly flammable R1234yf since 2013.

2,3,3,3-Tetrafluoropropene, HFO-1234yf, is a hydrofluoroolefin (HFO) with molecular formula CH2=CFCF3. Its primary application is as a refrigerant with low global warming potential (GWP).<a href="https://en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene#cite_note-Sciance-1"><span>[</span>1<span>]</span></a><a href="https://en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene#cite_note-CP2014-2"><span>[</span>2<span>]</span></a>

As a refrigerant, it is designated R-1234yf<a href="https://en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene#cite_note-Sciance-1"><span>[</span>1<span>]</span></a> and marketed under the names Opteon YF by Chemours and as Solstice yf by Honeywell.<a href="https://en.wikipedia.org/wiki/2,3,3,3-Tetrafluoropropene#cite_note-Aspen-3"><span>[</span>3<span>]</span></a> R-1234yf is also a component of zeotropic refrigerant blend R-454B.

Unlike previous vehicular refrigerants, 2,3,3,3‑tetrafluoropropene is flammable; how much risk this poses is discussed below. One drawback is it breaks down into short-chain perfluorinated carboxylic acids (PFCAs), which are persistent organic pollutants.
 
If we’re going flammable, just go to methane.

But electric cars need more fuel to burn as the batteries aren’t enough for a spectacular show.
 
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