Electric vehicles do not reduce PM emissions, and produce more microplastics as heavier vehicles erode tires faster. As helpful as EVs are they're not a cure-all for air pollution.
Whenever somebody suggests a solution to some part of the puzzle people say this. I don't know if you are suggesting we do nothing or that we ban vehicles on roads entirely.
2.) nuclear power emits greenhouse gases indirectly: (a) construction/decommission of the power plant, (b) mining and extraction of Uranium, (c) contamination of nuclear waste.
Besides, in a world with a surplus of nuclear energy, much of the plant construction and mining could be performed using nuclear generated electricity rather than burning diesel.