As impossible as it may seem to people outside the industry, grid-scale electricity storage hardly exists. There are some artificial lakes pump-filled with water that folks in mountain states can call on in a pinch, but that’s about as far as it goes. For now, no household has a cookie jar full of watts secreted away for later use; no nation has a strategic electricity reserve. As a result the electricity we use, day in and day out, is always fresh. So fresh, that less than a minute ago, if you live in wind farm territory, that electricity was a fast-moving gust of air. And if you live in coal
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