German here. For this study to be unbiased with certainty it should have come from somewhere else than the country threatened the most by EV success. But even if this would be an objective representation of which technology is worse for the planet, it is still a flawed conclusion because it compares a well established versus a new technology. To give a financial analogy, one wouldn't reject an expected business profitability just because it requires an investment – to the contrary, that is the case every time. The comparison should be between the result of continuing a descent until eternity, just because it doesn't require anything, versus the result of making an effort to go on a path that has potential to be way better in the long run.