The particles that make up smoke and clouds have important differences, which explains how they appear.
What makes clouds stick together? - Quora
MetLink - Royal Meteorological Society Clouds
How Can I Clear My Home of Wildfire Smoke?
You can't just hold your breath.' Toxic smoke, fueled by wildfires, chokes California
Why does smoke disperse but clouds seem to stick together?
Officials warn of dangerous conditions as brush fires bring smoke to D.C. area - The Washington Post
Aerosol-boundary-layer-monsoon interactions amplify semi-direct effect of biomass smoke on low cloud formation in Southeast Asia
Examples of smoke dispersion under a variety of atmospheric conditions
Photograph of dissipating fire whirl near the surface while rotating
What Happens When You Fly a Science Plane Through Wildfire Smoke
Iceland volcano ash cloud: The full story of how the airlines won the battle for the skies, UK news
Province of Manitoba agriculture - Smoke Dispersion: the Key to it All
