There is enormous opportunity in transforming our energy economy. My son-in-law, energy researcher and inventor Saul Griffith, has drawn a massive Sankey diagram—a map of all the energy sources and uses in the US economy to a resolution better than 1%. Standing next to the map, he explains to a visitor that any pathway on this map that is as big as his little finger (about 1% of energy flow) represents a $30–100 billion annual opportunity.
