The easiest way to live longer and keep your brain sharp

I’ve just bought an air purifier and am keen to justify the expense did so after careful consideration of the facts. You should consider it too, especially if you live in a city with bad air quality like London, as I do.

The evidence is mounting that improving your indoor air quality is much more important than we used to think.

It’s bad for your ability to think: chess players perform noticeably worse when there are more particulates in the air.

It’s also bad for your ability to stay alive as long as possible.

“A 2013 paper looked at life expectancies and particle levels in 545 US counties, while controlling for confounding variables like wealth, smoking, and demographics. They found that each 28.5 μg/m³ of particulates costs 1 year.“

You can get cheap air purifiers from Ikea, or study the reviews of fancier models.