Lithium burns toxic. Carbon based solid-state batteries that don't burn would be safe for buses. There are a number of new methods for reconditioning lithium i

Lithium burns toxic. Carbon based solid-state batteries that don't burn would be safe for buses. There are a number of new methods for reconditioning lithium instead of recycling. Biodegradable batteries would be great for many applications. You can recycle batteries at big box stores; find the battery recycling box at Lowes and Home Depot in the US.