Comment by jfengel
5 hours ago
Those are less of a problem. The heat was coming from the sun anyway. The water condenses out, so long as you haven't also increased the overall temperature in other ways.
The CO2, by contrast, is the gift that keeps on giving. It absorbs extra heat every day and hangs onto it. It doesn't condense or break down.
If that PV went to displacing sources of greenhouse gas, it would be a benefit. If all it's doing is running the plagiarism machine while we burn more and more "clean" coal, then we are in deep, deep trouble.
Not all heat from the sun stays in the atmosphere though. How much does photovoltaic impact albedo and radiance through the atmosphere compared to natural landscapes? Of course that's infinitely better than GHG emissions and we have a lot of opportunity to put PV over asphalt and such, but it should give us pause in the pursuit of more and more consumption.