Scientists thought carbon emissions had peaked. They've never been higher.

Near the end of 2020, as the covid-19 pandemic continued to rage, a few climate scientists and energy experts made a prediction. They estimated that emissions from fossil fuels - which had just plummeted thanks to the global pandemic - might never again reach the heights of 2019. Perhaps, they speculated, after over a century of ever more carbon dioxide flowing into the atmosphere, the world had finally reached "peak" emissions.

They were wrong.