C=O

[2–3 sentences: the carbon-monoxide risk firefighters face, when C=O is used, and the one idea that makes it different.]

[Who you spoke to or observed, and the key insight about how CO is assessed today.]

[How the form evolved for gloved hands, low visibility and rough use: sketches, models, testing.]

[Step by step: how a firefighter uses C=O, and how it communicates a reading.]

[One or two sentences, then let the renders carry it.]

[One or two sentences on the result — what it achieved, who it helped, where it was shown.]