[skissane]

Uh, I don't think that "our unsustainable way of life that currently relies on fossil fuels will somehow miraculously be converted to 100% clean energy".

I think fossil fuel use is going to decline over time. That's already happening in a lot of countries. It's going to be a gradual process, and I think eventually it is going to happen everywhere, but some parts of the world (e.g. Europe, US) are going to be ahead of others (e.g. China, India)

Is there such a thing as "100% clean energy"? I don't know if there ever will be such a thing, but so what. If you look at tonnes of CO2 emitted per a kilowatt-hour, over the life of a generator, then a solar farm is going to beat a coal power station, even when you include the CO2 emissions from the construction and the manufacturing of the equipment. Sure, the solar farm won't be "100% clean" (zero lifetime emissions), but it doesn't need to be, it just needs to be significantly better than the coal power station.

In some countries, coal power stations are being replaced by natural gas power stations. Natural gas obviously isn't 100% clean – it still emits CO2 and other pollutants. But it is a lot cleaner than coal. It emits less greenhouse gases for the same amount of power generated. We shouldn't let the perfect be the enemy of the better.