Postcards: CO₂ Concentration in the Atmosphere

These postcards show scientifically grounded visual representations of the ongoing increase in atmospheric carbon dioxide levels. Both postcards are based on real data that was measured at the Mauna Loa Observatory, Hawaii. They highlight the upward trend of atmospheric CO₂ concentrations over time, making the data accessible and understandable. By sharing these postcards, you are helping to spread awareness about the significant impacts of climate change.