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‘Energy independent’ Uruguay runs on 100% renewables for four straight months
(theprogressplaybook.com)
This is a most excellent place for technology news and articles.
Efficiency doesn't have to be consumer led, though. It could be stuff like higher building standards and subsidies for insulation, subsidies for heat pumps for AC and hot water, even seemingly trivial things like free/subsidised LED bulbs can add up (there is still a significant amount of non-LED bulbs in the wild in many countries).