Hydrogen vs. Battery Electric Cars

Wondering if you could also look at the long term effects of waste each create, so disposal of each and long term effects on the environment.  Also how dangerous each are  potentially when involved in a crash.  Can materials of the cars be recycled after they are no longer drivable?  How long are the estimated life spans of these cars?  So from start to end of life analysis and total impact both positive and negative on the environment.