Every mining operation has environmental impacts. Nickel is no different. Aside from that, nickel free LFP batteries will probably dominate the market in the years ahead. Oil and gas exploration, refining, and use has it's own very serious impact on the environment and our health.
In the push to normalize electric vehicles, many forget it’s not the end of the road as far as environmental impact is concerned. Presumably, those using electric vehicles or hybrids are motivated by a desire to improve the environment, especially by reducing carbon emissions into the atmosphere.