@NVEVA In the short run, there are other types of EVs, namely hybrids and PHEVs, that can be implemented faster. BEV fanatics have demonized them, and are pushing for 100% BEVs, even when it is impractical. This is really about pushing a product, not coming up with a solution to emissions.
There are no "studies" suggesting hydrogen is impractical. Mostly it is BEV propaganda disguised as studies. In reality, FCEVs already exist right now and work 100% as viable cars. /1