This is a basic problem, to feed 6.6 billion people. Without fertilizer, forget it. The game is over.

There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.

Without food, man at most can live but a few weeks; without it all other components of social justice are meaningless.

To this day, I enjoy nature, the luxury of undisturbed wilderness, forests, mountains, lakes, rivers and deserts and their wildlife. But I also know that the greatest danger to their perpetuity is the pressure of human population.

You can't build a peaceful world on empty stomachs and human misery.

There are 6.6 billion people on the planet today. With organic farming we could only feed four billion of them. Which two billion would volunteer to die?

Yet food is something that is taken for granted by most world leaders despite the fact that more than half of the population of the world is hungry.