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There are many open bare places on Earth where solar panels are useless because there are no electricity users nearby: any desert.

If all it takes is to truck the ceramic panels around and dump them to the ground, then it's probably not that expensive.

How long will they last in the desert though? My intuition say they would be covered with sand in a few weeks tops.

There are rocky deserts.

70% of Sahara is rocky, not sandy, for example.

Sure. But even there there is a ton of mobile dust and sand in the air.

So in order to save the environment we plan on covering it with white sheets?

Just because we don't want to tell Africa and China to stop burning and polluting and dumping it all in the rivers?

Just to point out, but it's not Africa, and it's mostly not China that are burning and polluting.