As of the year 2000, about 37 percent of Earth's land area was agricultural land.  That number is now estimated to be close to 50%. About one-third of this area, or 11 percent of Earth's total land, is used for crops -mainly to feed animals. The balance, roughly one-fourth of Earth's land area, is pastureland, which includes cultivated or wild forage crops for animals and open land used for grazing.

The other notable thing is that cats were not his list.