For context, after converting 50,000,000 vehicles from internal combustion to electric, the effect would be similar to eliminating 1 container ship (likely used to cargo all the materials and components necessary to build those cars). https://www.theguardian.com/environment/2009/apr/09/shipping...
I don't think this is a fair comparison. The article you reference specifically mentions "one giant container ship can emit almost the same amount of cancer and asthma-causing chemicals as 50m cars", but it doesn't seem to mention any comparison to Co2. The parent was talking about CO2.
It's fair to say that removing 50 million vehicles is equal to removing one container ship in terms of sulphur dioxide, or other pollutants, though
It's fair to say that removing 50 million vehicles is equal to removing one container ship in terms of sulphur dioxide, or other pollutants, though