What’s the difference between PM2.5 and PM10?

The difference between PM10 and PM2.5 is size. “PM” refers to particulate matter—particles in the air. Those particles are things like organic dust, airborne bacteria, construction dust, and coal particles from power plants (for example, check out this study from researchers in Shanghai who analyzed what those particles are really made of). Size Matters Now on […]

Read More

Is There Less Pollution on Higher Floors? How Living in a High Rise Affects Air Pollution?

Living on the 20th floor of a high rise building isolates people from the world. Cars, streets, shaokao vendors—they’re all farther away. So does that mean PM2.5 is lower on the higher floors of buildings? The Test Tristan from the Smart Air team tested this by taking laser particle counters from floor 1 to floor […]

Read More