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I don't think we're going to save anything if we go around talking about saving plants and animals only; we've got to translate that into what's in it for us.

We are in grave danger of losing forever not just millions of years of evolution on earth, but the eons of change that have produced man and his natural environment.

We have chosen to bring future generations into this world of rising seas and warming temperatures, droughts and floods, heat waves and wildfires, a world in which one in four mammals and one in eight birds are at risk of disappearing forever. While the damage we've done is irreversible, that doesn't give us the right to do nothing.

What we are doing to the future of our children, and the other species on the planet, is a clear moral issue.

Humans may be the only creatures on Earth who spend significant time thinking about the fact that someday their lives will end.

So often we talk about saving the planet, but what we really mean is to save the planet the way it is, so we can live here. So that is can sustain us.

Every animal would rather die themselves than lose their offspring. But it's just genes, isn't it? All of our existence is spent worrying about the next generation, but we don't actually seem to get anywhere.

I do think we're an endangered species. But that we do have a plan to save the rainforest.

My father so appropriately put it that we are certainly the only animal that makes conscious choices that are bad for our survival as a species.

We shouldn't be saying 'Save the planet'; we should be saying: 'Save viable conditions in which people can live.' That's what we're dealing with here.