Prescience of Genetic Engineering

As a matter of fact it was not until 1940 that Selkovski invented the purple alga Porpbyrococcus fixator which was to have so great an effect on the world's history. . . . Porpbyrococcus is an enormously efficient nitrogen-fixer and will grow in almost any climate where there are water and traces of potash and phosphates in the soil, obtaining its nitrogen from the air. It has about the effect in four days that a crop of vetches would have had in a year. . . . The enormous fall in food prices...

 Calories as Currency

When the world went on a single currency, they'd tried to coordinate it with the food rationing in some way, hoping to eventually eliminate the ration books, so they'd made the new currency K's, kilocalories, because that's the unit for measuring the energy equivalent of food. But a person who eats 2,000 kilocalories of steak a day obviously has to pay more than a person eating the same amount of bread. So they instituted a sliding "ration factor," so complicated that nobody could understand ...