Last week I complained bitterly about a graph that had all the data, but still failed to effectively tell readers how much CO₂ there is in the atmosphere now, compared to previous epochs. By separating the key final data point out to a separate graph it had blown the opportunity to show a direct comparison. This gave the impression that the current level of CO₂ is only marginally higher than previous peaks. Let’s see if we can find the truth with a quick redrawing…