Okay… but the reference they called out wasn’t very long and had a clear bar chart comparing different vehicular types that included battery manufacturing as one of the components.

One could even ignore all the text and just look at the bar chart for the numbers.

Any original analysis that’s worth its beans is going to be far denser than that reference or the NPR article. Scientific and technical publications aren’t quite as bad as reading legalese but they’re close, full of jargon and precise language.

Since that short reference with the bar chart was too dense, then what you’re looking for definitely seems to be a pop-sci type summary - like the original NPR article.