For four - fifths of our history, our planet was populated by pondscum. — J. William Schopf Copy Share Image
Erosion, desertification, and pollution have become our lot. It is a weird form of suicide, for we are bleeding our planet to… — Gerald Durrell Copy Share Image
Nuclear weaponry, of course, would be the be-all, end-all of just too many people in too many parts of our planet. — Sarah Palin Copy Share Image
Swimming has been a very effective medium for telling a story about the state of our planet. — Lewis Gordon Pugh Copy Share Image
Coal is the single greatest threat to civilization and all life on our planet. — James Hansen Copy Share Image
By far the single greatest danger facing humankind - in fact, all living beings on our planet - is the threat of… — Dalai Lama Copy Share Image
Anger, depression, guilt, and shame are the product of the thinking that is at the base of violence on our planet. — Marshall B. Rosenberg Copy Share Image
Terrorism is a horrible thing that is the great threat to civilization on our planet. — Walter Isaacson Copy Share Image
Many people on our planet right now despair; they think we've reached a point where we've discovered most of the things. I'm… — Nathan Wolfe Copy Share Image
I certainly believe in aliens in space, and that they are indeed visiting our planet. They may not look like us, but… — Barry Goldwater Copy Share Image
I'm not one to attribute every activity of man to the changes in the climate. There is something to be said also… — Sarah Copy Share Image
Due to many cosmic and worldly reasons, we will surely lose our planet one day! Till that dark day comes, let us… — Mehmet Murat Ildan Copy Share Image
The incidence of Alzheimer's disease is growing at a pace like never before, affecting people at a younger and younger age. This… — Benjamin Creme Copy Share Image
Whether we are poor among the poorest, or less poor among the wealthier, let us stand proud and noteworthy, united and strong,… — Mathieu Kerekou Copy Share Image
Humankind has suddenly entered into a brand new relationship with our planet. Unless we quickly and profoundly change the course of our… — Al Gore Copy Share Image
The white race is absolutely disagreeable to get along with in peace. No other people on the face of the earth have… — Khalid Abdul Muhammad Copy Share Image
When the space shuttle's engines cut off, and you're finally in space, in orbit, weightless... I remember unstrapping from my seat, floating… — Sally Ride Copy Share Image
There are degrees of loneliness, ways in which the experience of loneliness deepens, becomes something like what we might call a way… — Thomas L. Dumm Copy Share Image
We live in a world, it's very hard for Americans to understand that every 20 seconds a kid dies, a kid under… — Matt Damon Copy Share Image
The profound political changes we need in order to heal our planet will not come about through fragmented problem solving or intellectual… — Petra Kelly Copy Share Image
This hour in history needs a dedicated circle of transformed nonconformists. Our planet teeters on the brink of annihilation; dangerous passions of… — Martin Luther King, Jr Copy Share Image
This earth is one of the rare spots in the cosmos where mind has flowered. Man is a product of nearly three… — Julian Huxley Copy Share Image
Is civilization progress? The challenge, I think, is clear; and, as clearly, the final answer will be given not by our amassing… — Charles Lindbergh Copy Share Image
The living ocean drives planetary chemistry, governs climate and weather, and otherwise provides the cornerstone of the life-support system for all creatures… — Sylvia Earle Copy Share Image
To be sure, governments will remain critical to any comprehensive effort to save our planet. — Lawrence Bender Copy Share Image
I am passionate about many things but conserving our planet and its species is a high priority of mine. — Richard Branson Copy Share Image
Together, leading the world, the U.S.A. will rid our planet of this barbarous organization called ISIS. — Bernie Sanders Copy Share Image
All the conservation efforts in the world won't be enough to make a dent in the oncoming sustainability crisis our planet faces. — Naveen Jain Copy Share Image
We live in a time where we have more extinction happening on our planet than since the dinosaurs were wiped out 50… — Jeff Corwin Copy Share Image
Our biggest national security threat is the environmental destruction of our planet and the arms race with ourselves. — Jello Biafra Copy Share Image
Growing hemp as nature designed it is vital to our urgent need to reduce greenhouse gases and ensure the survival of our… — Jack Herer Copy Share Image
I believe that God left certain drugs growing naturally upon our planet to help speed up and facilitate our evolution. — Bill Hicks Copy Share Image
We've poisoned our planet to a desperate degree. We have no idea of how severe the toxification is. — Benjamin Creme Copy Share Image
I am really sobered by what's happening to ecosystems around our planet and to the wildlife that is to be found there. — Jeff Corwin Copy Share Image
Our planet's alarm is going off, and it is time to wake up and take action! — Leonardo DiCaprio Copy Share Image
The secret of success is to realize that the crisis on our planet is much larger than just deciding what to do… — Marianne Williamson Copy Share Image
We are addicted to money and our obsession with it is leading to the destruction of our planet. — Mark Boyle Copy Share Image
I think the most important thing people can do to save our planet and the human race is to empower women! — Robert Ballard Copy Share Image
Our planet is currently undergoing a mass extinction of species called the Anthropocene - the Age of Man. — Louie Psihoyos Copy Share Image
One of the jovian moons, Europa, is coated with twice as much liquid water as is sloshing around our planet. — Seth Shostak Copy Share Image