Am curious as to what the so-called "clean" alternatives are: coal, nuclear? A full lifecycle analysis of renewables such as solar and wind, may also not compar

Am curious as to what the so-called "clean" alternatives are: coal, nuclear? A full lifecycle analysis of renewables such as solar and wind, may also not compare favorably with wood, remember that wood is a also a renewable energy source. In some parts of the world, notably Europe, forest cover has actually been expanding, so its far from clear that wood is all that bad. The individual health impacts are clearly bad with current wood burning technology, and it is probably not something that one should be doing in high density urban centers, but on the whole, it seems far from proven that wood is worse than say photovoltaic panels https://news.nationalgeographic.com/news/energy/2014/11/141111-solar-panel-manufacturing-sustainability-ranking/ https://news.nationalgeographic.com/news/energy/2014/11/1411...