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Solar energy, which is both abundant and free, is poised to become the world’s leading power source by 2050. That’s thanks largely to technological advances and the unbridled manufacturing of solar cells, which bodes well for a successful energy transition.
The sun’s rays are the source of all the Earth’s renewable energy. This manna from heaven supplies the equivalent of one barrel (159 liters) of oil per square meter per year – at least in sunny regions, like Switzerland’s canton of Valais – at no cost.
What’s more, our capacity for turning…