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.

There are many animal-welfare groups that sometimes seem to forget that human beings are animals too, that we need to include them in our sphere of compassion.

We can't leave people in abject poverty, so we need to raise the standard of living for 80% of the world's people, while bringing it down considerably for the 20% who are destroying our natural resources.

The cheapest and most efficient way of slowing down global warming is to protect and restore the forests, particularly the tropical forests

Primates are very territorial. It is in their nature to protect their food resources as well as their females and young.

Especially females and the younger ones like to be with somebody who is wise.

Hundreds and thousands of young people around the world can break through and can make this a better world for all living things. Once young people know the problems and are empowered to act, they have great power to impact the world.