Plant diseases, drought, desolation, despair were recurrent catastrophes during the ages - and the ancient remedies: supplications to supernatural spirits or gods.

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?

We are 6.6 billion people now. We can only feed 4 billion. I don't see 2 billion volunteers to disappear.

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

Man seems to insist on ignoring the lessons available from history.

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.