But as companies and their employees ponder what the post-pandemic office will be like, the cool new amenity won’t be a foosball table. It’ll be something we should have had all along—clean air.

I oversee the Healthy Buildings program at Harvard’s public-health school. Our research focuses on how indoor air affects cognition and other aspects of human well-being. (I should note that I also advise businesses, nonprofits, government leaders, and real-estate companies on ventilation and other healthy-building strategies.) In the United States, an engineering guideline known as “acceptable indoor air quality” governs how much air is brought into a building. The problem is right there in the name: I don’t know about you, but I don’t want acceptable air quality; I want good air quality. Instead of being designed to meet a bare-minimum standard, buildings should optimize human health…

Our lack of attention to the air we breathe indoors looks reckless in hindsight. Humanity is now an indoor species. Americans spend 90 percent of our lives indoors. You take 6,000 breaths in your workplace on an average day. Over the past 100 years, humans have made astonishing gains in public health by focusing on the basics of clean water, food safety, and sanitation. But as dozens of my scientific colleagues around the world and I argued recently in the journal Science, governments have not similarly prioritized cleaning up the air that most people breathe most of the time. “In the 21st century,” the article urged, “we need to establish the foundations to ensure the air in our buildings is clean … just as we expect for the water coming out of our taps.”