Air pollution, noise, and light exposure accumulate slowly over decades to increase cardiovascular and respiratory disease risk, yet these environmental factors rank far below sleep, exercise, and nutrition in the health priority hierarchy. Peter Attia separates evidence-backed risks from overstated concerns, offering a practical framework for which exposures deserve your limited time and money. Environmental exposures like air pollution cause measurable harm through cardiovascular and respiratory disease, but their effects are small compared to modifiable behaviors like sleep and exercise, making them lower priority for most people.