"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." - Norman Borlaug
"We're all interconnected. For example, a simple lack of fresh water can lead to population dislocation, which can lead to political radicalization, which can lead to great pressure on the states that receive refugees because of a migrating population." - Harrison Ford
"Our population and use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill." - Stephen Hawking
"It's coming home to roost over the next years or so. It's not just climate change; it's sheer space, places to grow food for this enormous horde. Either we limit our population growth or the natural world will do it for us, and the natural world is doing it for us right now." - David Attenborough