Heat waves are a big problem. We all know about deaths and brain damage from heat stroke, but even modest increases in temperature over what we expect leads to consistently worse decision-making.
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When it was in the 90s this week, I was unable / unwilling to do simple math tasks like currency exchange rates. Moving was hard. Thinking strategically about how to solve the problem of how heat impacting my cognition was beyond me.
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It's evening, so it's cool enough that I can think. For now. The world is heating up, and it would not be surprising if even small increases in temperature had a hugely negative impact on our cognition over the course of a hot season.
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I generically bet this fails to replicate because it sounds like many other things that have not replicated. (Though supremely important if true - IQ points are hard to come by.)
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Agreed that the study doesn't look particularly waterproof. Personally, CO2 levels, temperature, and pollen levels make me less intelligent. These all seem to be going up, and if other people are kind of like me, this is alarming.
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In small buildings, there's unfortunate tradeoff between temperature control and CO2 concentration. But better-engineered (especially large) buildings can get both, with centralized HVAC and heat exchangers.
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