I am not disagreeing, I have simply never seen a good study to back up your comment.

How is it more environmentally friendly? At the manufacturing point? At the end point? Overall in every way measurable?

What i have read is this-
- it takes 14 times more energy to create a CF frame vs a steel frame.
- steel and aluminum frames and components can be recycled. There is no established recycling process for CF frames or components.
- CF doesnt break down over time due to the very properties which make it so appealing as a finished product.


There are steel frame bikes still in use which are 50 years old. Millions of 20-40 year old steel frame bikes are still able to be used in the US alone. Seriously- millions.
At what year of use does a steel frame catch up to carbon?...after 10 years? 20?


I am genuinely interested in this topic so please link specifics showing in what way(s) metal frames are environmentally worse, and measurably how much worse they are.

Really- Worse in terms of water use at the point of manufacturing? Worse in terms of pollutants released durong manufacturing? Worse how?