Able Quote by Paul R. Ehrlich

When my parents were growing up the world's population was under three billion. During my children's lifetime, it is likely to exceed nine billion.…

— Tony Blair

The number of children in the world is not growing, and so we eventually have a chance to stabilize the population at around 10…

— Johan Rockstrom

The world today has 6.8 billion people...that's headed up to about 9 billion. If we do a really great job on vaccines, health care,…

— Bill Gates

At the beginning of the 20th century, there were less than 3 billion people on the earth, closer to 2 billion. By all measures…

— Edgar Mitchell

If we look at things scientifically, there is more than enough food and material goods on Earth to take care of all people's needs…

— Jacque Fresco

If a thing which is believed by billions is against the reason and not supported by the science, it is a great honour not…

— Mehmet Murat Ildan

This planet might be able to support perhaps as many as half a billion people who could live a sustainable life in relative comfort.…

— Eric Pianka

“Whether we accept it or not, this will likely be the century that determines what the optimal human population is for our planet. It…

— Alan Weisman

“If we're going to survive as a planet with more than 6 billion people without destroying the complex balance of our natural ecosystems, the…

— Steven Johnson

The problems to be faced are vast and complex, but come down to this: 6.6 billion people are breeding exponentially. The process of fulfilling…

— Paul Hawken

With the observable fact that scientific knowledge makes our lives better when applied with concern for human welfare and environmental protection, there is no…

— Jacque Fresco

In a world of plenty, no one, not a single person, should go hungry. But almost 1 billion still do not have enough to…

— Ban Ki-moon