U didn't, so I said it for you
I love these environmental arguments. Total life cycle assessments are generally just a big marketing tool. Both have pro's and cons. Sure you could find lithium dudes talking CO, PAH and NOX emissions. I could find gas guzzlers that'll quote coal, battery waste, manufacturing processes etc. Potato, tomato.....
If I'm gunna burn, I want to burn here and now, not somewhere upstream or in China as part of manufacturing. And I want to sniff the fumes as I fill it up. Get the double buzz....