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Proposal of Lithium mine states that billions of gallons of ground water will be used, with some of it being unsafe for drinking for 300 years. And toxic waste containing large amounts of sulfuric acid and possibly modestly radioactive uranium will be left behind.
A battery pack alone would generate 74% more emissions than the entire conventional car.
https://sgp.fas.org/crs/misc/R46420.pdf
In addition to a review of the literature, CRS focused on the results of one study in order to present an internally consistent example of an LCA. This specific study finds that the life cycle of selected lithium-ion BEVs emits, on average, an estimated 33% less GHGs, 61% less volatile organic compounds, 93% less carbon monoxide, 28% less nitrogen oxides, and 32% less black carbon than the life cycle of ICEVs in the United States. However, the life cycle of the selected lithium-ion BEVs emits, on average, an estimated 15% more fine particulate matter and 273% more sulfur oxides, largely due to battery production and the electricity generation source used to charge the vehicle batteries. Further, the life cycle of the selected lithium-ion BEVs consumes, on average, an estimated 29% less total energy resources and 37% less fossil fuel resources, but 56% more water resources. These results are global effects, based on the system boundaries and input assumptions of the study.