- "The Earth is a fine place and worth fighting for." — Ernest Hemingway
- "The greatest threat to our planet is the belief that someone else will save it." — Robert Swan
- "We won’t have a society if we destroy the environment." — Margaret Mead
- "The environment is where we all meet; it is the one thing all of us share." — Lady Bird Johnson
- "What we are doing to the forests of the world is but a mirror reflection of what we are doing to ourselves." — Mahatma Gandhi
- "There is no Wi-Fi in the forest, but I promise you will find a better connection." — Unknown
- "We do not inherit the Earth from our ancestors; we borrow it from our children." — Native American Proverb
- "Conservation is a state of harmony between men and land." — Aldo Leopold
- "When the last tree is cut, the last fish caught, and the last river poisoned, you will realize you cannot eat money." — Cree Proverb
- "The Earth will not continue to offer its harvest, except with faithful stewardship." — Pope John Paul II
- "One of the first conditions of happiness is that the link between man and nature shall not be broken." — Leo Tolstoy
- "Protecting our future on this planet depends on the conscious evolution of our species." — Leonardo DiCaprio
- "To cherish what remains of the Earth and to foster its renewal is our only legitimate hope of survival." — Wendell Berry
- "Nature provides a free lunch, but only if we control our appetites." — William Ruckelshaus
- "Environmental pollution is an incurable disease. It can only be prevented." — Barry Commoner
- "Every person who has ever lived has a responsibility to leave the Earth better than they found it." — Unknown
- "Until man duplicates a blade of grass, nature can laugh at his so-called scientific knowledge." — Thomas Edison
- "The environment is in us, not outside of us. The trees are our lungs; the rivers, our bloodstream." — Thich Nhat Hanh
- "Plans to protect air and water, wilderness and wildlife are in fact plans to protect man." — Stewart Udall
- "It is horrifying that we have to fight our own government to save the environment." — Ansel Adams
- "If we don’t take care of nature, nature will surely take care of us… just not in the way we would hope." — Unknown
- "We are on Earth to take care of life. We are on Earth to take care of each other." — Xiye Bastida
- "Take nothing but pictures, leave nothing but footprints, kill nothing but time." — Unknown
- "Earth provides enough to satisfy every man's needs, but not every man's greed." — Mahatma Gandhi
- "Nature is pleased with simplicity. And nature is no dummy." — Isaac Newton
- "In nature, nothing is perfect, and everything is perfect." — Alice Walker
- "If the bee disappeared off the surface of the globe, then man would only have four years of life left." — Maurice Maeterlinck
- "Only when the last tree has died and the last river been poisoned will we realize we cannot eat money." — Cree Proverb
- "To leave the world better than you found it, sometimes you have to pick up other people’s trash." — Bill Nye
- "The environment is everything that isn’t me." — Albert Einstein
- "There are no passengers on Spaceship Earth. We are all crew." — Marshall McLuhan
- "The future will be green, or not at all." — Jonathan Porritt
- "Like music and art, love of nature is a common language that can transcend political or social boundaries." — Jimmy Carter
- "The environment, after all, is where we all meet, where all have a mutual interest." — Lady Bird Johnson
- "The Earth does not belong to us. We belong to the Earth." — Chief Seattle
- "Wilderness is not a luxury but a necessity of the human spirit." — Edward Abbey
- "Our planet’s alarm is going off, and it is time to wake up and take action!" — Leonardo DiCaprio
- "Take care of the Earth and she will take care of you." — Unknown
- "Waste is a resource in the wrong place." — Nathaniel Wertheimer
- "To protect the environment is to protect human life." — Richard Nixon
- "If we surrendered to Earth’s intelligence, we could rise up rooted, like trees." — Rainer Maria Rilke
- "Look after the land, and the land will look after you. Destroy the land, and it will destroy you." — Aboriginal Proverb
- "The supreme reality of our time is the vulnerability of our planet." — John F. Kennedy
- "It is our collective and individual responsibility to preserve and tend to the environment in which we all live." — Dalai Lama
- "Nature doesn’t need people; people need nature." — Harrison Ford
- "We cannot command nature except by obeying her." — Francis Bacon
- "In every walk with nature, one receives far more than he seeks." — John Muir
- "We are living on this planet as if we had another one to go to." — Terry Swearingen
- "When we heal the earth, we heal ourselves." — David Orr
- "Nature is not a place to visit. It is home." — Gary Snyder
- "Do not destroy what you cannot create." — Unknown
- "Conservation means the wise use of the earth and its resources for the lasting good of men." — Gifford Pinchot
- "Our environment, the world in which we live and work, is a mirror of our attitudes and expectations." — Earl Nightingale
- "The natural environment sustains the life of all beings universally." — Dalai Lama
- "If you really think the environment is less important than the economy, try holding your breath while you count your money." — Guy McPherson
- "A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community." — Aldo Leopold
- "We cannot solve our problems with the same thinking we used when we created them." — Albert Einstein
- "I would feel more optimistic about a bright future for man if he spent less time proving he can outwit nature." — E.B. White
- "A true conservationist is a man who knows that the world is not given by his fathers but borrowed from his children." — John James Audubon
- "What’s the use of a fine house if you haven’t got a tolerable planet to put it on?" — Henry David Thoreau
- "To forget how to dig the earth and to tend the soil is to forget ourselves." — Mahatma Gandhi
- "The Earth has music for those who listen." — William Shakespeare
- "Take a course in good water and air; and in the eternal youth of Nature you may renew your own." — John Muir
- "The most environmentally friendly product is the one you didn’t buy." — Joshua Becker
- "Nature always wears the colors of the spirit." — Ralph Waldo Emerson
- "Our past, our present, and whatever remains of our future, absolutely depend on what we do now." — Sylvia Earle
- "We are not above nature, we are part of it." — Unknown
- "Every act of conservation is an act of creation." — Wendell Berry
- "The poetry of the earth is never dead." — John Keats
- "Sustainability is no longer about doing less harm. It’s about doing more good." — Jochen Zeitz
- "Water and air, the two essential fluids on which all life depends, have become global garbage cans." — Jacques Cousteau
- "For in the true nature of things, if we rightly consider, every green tree is far more glorious than if it were made of gold and silver." — Martin Luther
- "Time spent among trees is never time wasted." — Katrina Mayer
- "An environment is something we cannot replace; it is not made by human hands." — Ban Ki-moon
- "The Earth will continue to live, but man will destroy himself." — Jules Verne
- "Nature holds the key to our aesthetic, intellectual, cognitive, and even spiritual satisfaction." — E. O. Wilson
- "There is no power for change greater than a community discovering what it cares about." — Margaret J. Wheatley
- "The greatest threat to our planet is the belief that someone else will save it." — Robert Swan
- "If we kill off the wild, then we are killing a part of our souls." — Jane Goodall
- "One touch of nature makes the whole world kin." — William Shakespeare
- "You can’t be an environmentalist and eat meat." — Howard Lyman
- "Preserve and cherish the pale blue dot, the only home we’ve ever known." — Carl Sagan
- "Love of nature is a common language that can transcend political or social boundaries." — Jimmy Carter
- "It is not the Earth that is in danger, but ourselves." — Jules Renard
- "The care of the Earth is our most ancient and most worthy responsibility." — Wendell Berry
- "If we pollute the air, water, and soil that keep us alive, we become extinct." — David Suzuki
- "Nature is painting for us, day after day, pictures of infinite beauty." — John Ruskin
- "The environment is a precious gift we must cherish and protect." — Unknown
- "We need the tonic of wildness." — Henry David Thoreau
- "An understanding of the natural world is a source of great fulfillment." — David Attenborough
- "The future belongs to those who understand that doing more with less is compassionate, prosperous, and enduringly wise." — Paul Hawken
- "Our planet is an extraordinary gift, and we must protect it." — Unknown
- "The natural world is the refuge of the spirit." — Peter Matthiessen
- "For most of history, man has had to fight nature to survive; in this century he is beginning to realize that, in order to survive, he must protect it." — Jacques-Yves Cousteau
- "Good planets are hard to find." — Unknown
- "Let us permit nature to have her way. She understands her business better than we do." — Michel de Montaigne
- "The Earth laughs in flowers." — Ralph Waldo Emerson
- "Our life is frittered away by detail…simplify, simplify." — Henry David Thoreau
- "Our world is at peace when nature is in harmony." — Unknown
- "Remember, Earth is the one thing we all have in common." — Unknown