Solar still needs storage cheap enough to move energy between seasons. I have been working on a startup to do this for the last two years.
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Construction productivity is a topic that has interested me for years. When an engineer sees an inefficient process with no improvement, it ticks them off. Construction is error-prone, expensive, and suffers delays. The government thinks construction productivity has slightly decreased since 1960. It just needs some…
Productivity growth has not been as fast as proponents of the "digital revolution" expected. Besides a short burst of higher productivity growth in the late 1990s and early 2000s (the higher slope portion), it is hard to see the impact.
Geothermal seems so simple, endless heat out of the ground. It is currently a niche electricity source, generating 0.4% of electricity in the United States. Several factors have kept geothermal from scaling.