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> i get particularly excited by projects that could provide grid-free lighting and clean water to rural areas.

The best way to provide lighting and clean water is via the grid: power lines and water pipes.

yes, in the long term i agree, but extending the grid's reach and capacity happens slowly, and in the mean time the poor lead miserable lives. these low-tech stopgap measures are things they can do now to improve their lot, for little up-front cost (in business terms, the grid has lower opex, but way higher capex)

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