If it gets cheaper then Jevons Paradox [1] would strongly indicate that it won't in any way reduce the negative impacts (and would tend to actually increase them)

[^1]: https://en.wikipedia.org/wiki/Jevons_paradox

Excerpt: Jevons Paradox/Effect is an economic phenomenon said to occur when technological improvements that increase the efficiency of a resource's use lead to a rise, rather than a fall, in total consumption of that resource