If the microplastics nucleate ice (as shown here for certain types of microplastics), ice nucleation followed by precipitation can also affect their long-range transport to faraway regions and their atmospheric concentrations and distributions. Recent simulations using a global chemistry-climate transport model showed that ice nucleation by fungal spores followed by precipitation, significantly impacted their long-range transport and concentrations in remote regions and the upper troposphere. The size of fungal spores ranges from 2 to 50 µm. Since some microplastics have similar 𝑛 𝑠 -values to fungal spores (Figure ), and may have similar sizes to some fungal spores, ice nucleation by microplastics may influence their long-range transport and concentrations in remote regions and the upper troposphere under some atmospheric conditions, such as when mineral dust and biological INP concentrations are low. The freezing data included here provide necessary information for including this phenomenon into atmospheric models.