The PDF does not explain where the data comes from or how it was counted. And it explicitly says that the data is not peer-reviewed. At least it does give references at the end.

Also, Fig. 1 in the PDF shows "geophysical events"--earthquakes, tsunamis, and volcanic eruptions--rising in frequency as well. By the argument given, that means we humans are causing more earthquakes, tsunamis, and volcanic eruptions by putting more CO2 into the air. Which immediately makes me read this PDF as spin, not substance.