| UVA | Ultraviolet A |
| UVB | Ultraviolet B |
| IR | Infrared |
| MMPs | Matrix metalloproteinases |
| ROS | Reactive oxygen species |
| AP-1 | activator protein-1 |
| NFκB | Nuclear factor kappa-light-chain-enhancer of activated B cells |
| TGF-β | Transforming growth factor beta |
| PM2.5 | Small particulate matter |
| AhR | Aryl hydrocarbon receptor |
| Bcl-2 | B-cell lymphoma 2 |
| ETC | Electron transport chain |
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