It is baffling, I must say, that in our modern world we have such blind trust in science and technology that we all accept what science tells us about everything - until, that is, it comes to climate science.
Conflict, of course, comes about because of the misuse of power and the clash of ideals, not to mention the inflammatory activities of unscrupulous and bigoted leaders. But it also arises, tragically, from an inability to understand and from the powerful emotions which, out of misunderstanding, lead to distrust and fear.
We're busily wrecking the chances for future generations at a rapid rate of knots by not recognizing the damage we're doing to the natural environment, bearing in mind that this is the only planet that we know has any life on it.
We need to be realistic. There is very little we can do now to stop the ice from disappearing from the North Pole in the summer. And we probably cannot prevent the melting of the permafrost and the resulting release of methane. In addition, I fear that we may be too late to help the oceans maintain their ability to absorb carbon dioxide.
Congratulations to 'Countdown' - it was an evening I will never forget - and a special thank you to Molly Meldrum.
We would never comment on private correspondence.
The whole of nature cries out at our mistreatment of her. If the planet were a patient, we would have treated her long ago.
We might be more inclined to think about the longer term if we were more aware of what is happening around us. Perhaps daily weather forecasts could include a few basic facts about the Earth's vital signs or details of where climate change is increasing the likelihood of damaging weather?
The whole imposing edifice of modern medicine is like the celebrated tower of Pisa - slightly off balance.
Perhaps it has been too uncomfortable for those with vested interests to acknowledge, but we have spent the best part of the past century enthusiastically testing the world to utter destruction; not looking closely enough at the long-term impact our actions will have.
The medieval Islamic world, from Central Asia to the shores of the Atlantic, was a world where scholars and men of learning flourished. But because we have tended to see Islam as the enemy of the West, as an alien culture, society, and system of belief, we have tended to ignore or erase its great relevance to our own history.
Extremism is no more the monopoly of Islam than it is the monopoly of other religions, including Christianity.
I have for some time now been deeply troubled by the growing difficulties faced by Christian communities in various parts of the Middle East. It seems to me that we cannot ignore the fact that Christians in the Middle East are increasingly being deliberately targeted by fundamentalist Islamist militants.
Your greatest achievement is to love me.
We can halt the destruction of the world's rainforests - and even restore parts of them - in order to ensure that the forests do what they are so good at - in other words, storing carbon naturally.
On an increasingly crowded planet, humanity faces many threats - but none is greater than climate change. It magnifies every hazard and tension of our existence.
Hong Kong has created one of the most successful societies on Earth.
I have often thought that one of the less attractive traits of various professional bodies and institutions is the deeply ingrained suspicion and outright hostility which can exist towards anything unorthodox or unconventional.
There's nothing like a jolly good disaster to get people to start doing something.
The whole of the 20th century has always put the car at the center. So by putting the pedestrian first, you create these livable places, I think, with more attraction and interest and character.