“As I'm traveling around, I meet many small children. And when I look at a small and think how we've harmed this beautiful planet since I was that age, I feel a kind of desperation, anger, shame. I don't know what I feel; I just don't know what the emotion is.”

“When I was 10 years old, I loved - I loved books, and I used to haunt the secondhand bookshop. And I found a little book I could just afford, and I bought it, and I took it home. And I climbed up my favorite tree, and I read that book from cover to cover. And that was Tarzan of the Apes. I immediately fell in love with Tarzan.”

“Change happens by listening and then starting a dialogue with the people who are doing something you don't believe is right.”

“As a small child in England, I had this dream of going to Africa. We didn't have any money and I was a girl, so everyone except my mother laughed at it. When I left school, there was no money for me to go to university, so I went to secretarial college and got a job.”

“The tree I had in the garden as a child, my beech tree, I used to climb up there and spend hours. I took my homework up there, my books, I went up there if I was sad, and it just felt very good to be up there among the green leaves and the birds and the sky.”

“I am not deeply involved in Australian politics but I know there are prime ministers, governments around the world who are not acting responsibly in relation to climate change.”

“My mother always taught us that if people don't agree with you, the important thing is to listen to them. But if you've listened to them carefully and you still think that you're right, then you must have the courage of your convictions.”

“Words can be said in bitterness and anger, and often there seems to be an element of truth in the nastiness. And words don't go away, they just echo around.”

“You cannot share your life with a dog, as I had done in Bournemouth, or a cat, and not know perfectly well that animals have personalities and minds and feelings.”

“My mother always used to say, 'Well, if you had been born a little girl growing up in Egypt, you would go to church or go to worship Allah, but surely if those people are worshipping a God, it must be the same God' - that's what she always said. The same God with different names.”

“I was brought up to understand Darwin's theory of evolution. I spent hours and hours in the Natural History Museum in London looking at the descriptions of how different kinds of animals had evolved, looking at the sequence of fossil bones looking gradually more and more and more and more like the modern fossil.”