So is mine, supposedly, but overall we have a long way to go in switching the grid to renewables. The states that have the lowest dependence on fossil fuels for generation all have a significant amount of hydro power, which is probably not going to expand, and which can have its own environmental issues.

Some locations have a great mix of wind + sun, so minimal backup storage may be required. What is the plan/cost for offsetting solar cell production and recycling?

Solar electricity, including panel production and disposal, is so much less emissive than even the cleanest gas generator (let alone coal or such), that I honestly find that a worry for later. Let's get the world on low emissions before nitpicking about how to get it fully circular (likely, that's near-impossible and we'll eventually need to mine other bodies in the solar/star system, but that, too, I find to be a worry for later). It comes across as though you're asking a vegetarian if they've ever killed a mosquito. Perfect is the enemy of good

If it's a serious question, then this is where carbon capture will have to come in, if our emissions aren't already low enough to be workable for the earth's natural carbon cycles