“You cannot get through a single day without having an impact on the world around you. What you do makes a difference, and you have to decide what kind of difference you want to make.”
Jane Goodall

“We rich nations, for that is what we are, have an obligation not only to the poor nations, but to all the grandchildren of the world, rich and poor. We have not inherited this earth from our parents to do with it what we will. We have borrowed it from our children and we must be careful to use it in their interests as well as our own. Anyone who fails to recognise the basic validity of the proposition put in different ways by increasing numbers of writers, from Malthus to The Club of Rome, is either ignorant, a fool, or evil.”
Moss Cass

“Humankind has not woven the web of life. We are but one thread within it. Whatever we do to the web, we do to ourselves. All things are bound together … all things connect.”
Chief Seattle

“What we are doing to the forests of the world is but a mirror reflection of what we are doing to ourselves and to one another.”
Mahatma Gandhi

“To be poor and be without trees, is to be the most starved human being in the world. To be poor and have trees, is to be completely rich in ways that money can never buy.” 
Clarissa Pinkola Estés

“Water and air, the two essential fluids on which all life depends, have become global garbage cans.”
Jacques-Yves Cousteau

“…there were only fifteen thousand polar bears in the world, and five billion of me. To let one of them devour my all-too-common flesh would, if only slightly, help adjust the grievous imbalance.” 
Lawrence Millman

“Wildness reminds us what it means to be human, what we are connected to rather than what we are separate from.”
Terry Tempest Williams

“In the end, we conserve only what we love. We will love only what we understand. We will understand only what we are taught.” 
Baba Dioum

“We need another and a wiser and perhaps a more mystical concept of animals… In a world older and more complete than ours they move finished and complete, gifted with extensions of the senses we have lost or never attained, living by voices we shall never hear. They are not brethren, they are not underlings; they are other nations, caught with ourselves in the net of life and time, fellow prisoners of the splendour and travail of the earth.”
Henry Beston