There's plenty of studies done comparing the footprint of nuclear to solar/wind, generally they show they're more or less equivalent, depending on what you measure and various assumptions built into the study - at least one IPCC study showed nuclear could have a measurably (up to 4x!) lower carbon footprint than solar. At any rate there's certainly no real reason to object to nuclear on environmental grounds (but on economical grounds, terrorism risk, plutonium proliferation, etc., sure, there are downsides that don't really exist with renewables).