This is completely inaccurate. Total CO2 discharge from the Mt. Pinatubo eruption was 50 million tonnes (50,000,000). Total SO2 discharge was 20 million tonnes (20,000,000). (The SO2 caused the short-term effects.)
Total CO2 discharge from humans in 2010 was 35 billion tonnes (35,000,000,000). That's 700 times as much as Mt. Pinatubo.
https://volcanoes.usgs.gov/vhp/gas_climate.html
Very misleading numbers here. They are actually taking into count people exhaling. They are estimating the toll of human development.
With their supposed science there are many ways to skew the true impacting numbers.