This is the moment when we must come together to save this planet. Let us resolve that we will not leave our children a world where the oceans rise and famine spreads and terrible storms devastate our lands.

I think we are bound to, and by, nature. We may want to deny this connection and try to believe we control the external world, but every time there's a snowstorm or drought, we know our fate is tied to the world around us

The entire range of living matter on Earth from whales to viruses and from oaks to algae could be regarded as constituting a single living entity capable of maintaining the Earth's atmosphere to suit its overall needs and endowed with faculties and powers far beyond those of its constituent parts.

For every human illness, somewhere in the world there exists a plant which is the cure.

Human beings have fabricated the illusion that in the 21st century they have the technological prowess to be independent of nature. Bees underline the reality that we are more, not less, dependent on nature’s services in a world of close to seven billion people.

Men need to know the elemental challenges that sea and mountains present. They need to know what it is to be alive and to survive when great storms come. They need to unlock the secrets of streams, lakes, and canyons and to find how these treasures are veritable storehouses of inspiration. They must experience the sense of mastery of adversity. They must find a peak or a ridge that they can reach under their own power alone.