The world's supply of agricultural land, he wrote, was "shrinking fast" and "every year producing less food."
"The supply of possible workers has shrunk," he said.
More significantly, the supply of new recruits has drastically shrunk.
Six months after the city cut the payments by at least half, housing advocates and others say the supply of such apartments is shrinking fast.
Traders said the market had been focused on gasoline for weeks, as the nation's supply shrank this spring.
And when supplies shrank, they often had to absorb quick price increases.
Prices would probably be lower still if the supply weren't shrinking.
Day after day went by, and the supply of food in the hospital shrank.
The population is growing and the supply of water is shrinking.
It was the second weekly drop, and suggests that the supply of labor is still shrinking.