Fear propaganda. Everyone's concerned about CO2 ppm, as if we're approaching some dangerous unknown territory of high CO2. But CO2 ppm has been much higher than it is today for most of Earth's history. People are terrified about going from 300 to 400 when not that long ago, it was 1000. It's indisputable that CO2 ppm of 400 is closer to a dangerous <i>low</i> than a dangerous high; plant respiration ceases around, what, 150? That would mean the extinction of most life on Earth, right?<p>Climate catastrophism is a modern doomsday cult that is able to keep operating because the failed predictions are forgotten by the time they're proven false.