This series is something neuroscientist Alison Bernstein and biologist Iida Ruishalme have been brewing over for a long time. Risk perception is such a big crux in science communication that it’s worth taking a moment to reflect on. We decided to cross-post it both on SciMoms and Thoughtscapism in the hopes of spreading the message far and wide.
The difference between hazard and risk is a critical distinction
Hazard and risk describe two different but related concepts. The difference may sound like an unimportant jargon-filled distinction, but this difference is critical to understanding reports of hazards and risks.
A hazard is an agent that has the potential to cause harm.
Risk measures the likelihood of harm from a hazard.
Hazards only become risks when there is exposure. Sharks are a hazard. But if I never go near the ocean, I have no exposure to sharks and face no risk of a shark attack. (Granted, even if you go in the ocean, the risk of shark attack is actually very low.) Despite this difference, we tend to consider all hazards as risks, regardless of our level of exposure.

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