When we say we can smell spring, we are really smelling tree aerosols

When we say we can smell spring, we are really smelling tree aerosols. As the air temperature heats up, so do the biochemical reactions within the wood and leaves. Evergreen forests smell strongest in midsummer, which is also when pests are busiest. The so-called “pinosylvin” in pine trees and the terpinoids of cypress trees both stimulate respiration and act as mild sedatives, relaxing us.

The Nature Fix: Why Nature Makes Us Happier, Healthier, and More Creative by Florence Williams

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