Excellent visualization of the increase in the concentration of carbon dioxide in the atmosphere of the planet. The particles are 1x1x1, which makes them exactly 1ppm each. Reddit user: Kevpluck Data source: Etheridge, D. et al. and Scripps Institution of Oceanography. A bright representation of the greenhouse effect because it explains how likely it is for an infrared wave emitted from the planet's surface to be bounced back by one of the CO2 particles.