Health to the ocean means health for us.

The climate has been changing. Of course it [has]. Evidence throughout history, [which] we can assess, especially during human history, shows there have been ups and downs. But the last ten thousand years have been relatively stable compared to now.

You should ask where your food is coming from.

It is not too late to turn things around.

Any astronaut can tell you you've got to do everything you can to learn about your life support system and then do everything you can to take care of it.

Ironically the very energy, the very basis of how we know what we know, has been reliant on having an energy source [necessary] to build rockets to go to the moon and Mars, to support airplanes that fly, and satellites to give us our communication.

In the past few decades, Earth's natural systems have endured more pressure than in all preceding human history.