What environmental disaster, specifically? It is just a light alkali metal.
Lithium can form dendrites (Which can lead to battery short circuit) with multiple high-current charge cycles due to only one valance electron. The chargers that come with the cart are very low current...18A or so. The EZGO Elite 4.2 charges at a rate of about 10 miles per hour with the 1000W delta-q charger.
Lithium - Wikipedia