nope. building solar panels pollute. disposing them more so. the setup with mirror and a standard turbine has less costs tied to manufacturing, but creates a huge no fly zone for birds.. and everything else really, so you can't plop a thousand of them all over the place. having them in deserts works, but you still need to transport the energy, which has a cost and again an environmental impact.

now, all in all the impact from solar is quite less than burning coal or oil, but there are other solution that are at least competitive (methane, nuclear) - but there are very few studies compare the total cost and pollution including externalities, because everyone likes to profit on the state incentives