"Nevertheless, there is another threat on the horizon. I see this threat in environmentalism which is becoming a new dominant ideology, if not a religion. Its main weapon is raising the alarm and predicting the human life endangering climate change based on man-made global warming."
"I sort of feel that climate change will be solved by science. I just feel instinctively that we will find a way of saving ourselves. But I am less confident that we won't destroy ourselves in other ways."
"I believe we should reframe our response to climate change as an imperative for growth rather than merely being a way of being green or meeting environmental commitments."
"The most important thing about global warming is this. Whether humans are responsible for the bulk of climate change is going to be left to the scientists, but it's all of our responsibility to leave this planet in better shape for the future generations than we found it."
"It's coming home to roost over the next 50 years or so. It's not just climate change it's sheer space, places to grow food for this enormous horde. Either we limit our population growth or the natural world will do it for us, and the natural world is doing it for us right now."
"Some argue that now isn't the time to push the green agenda - that all efforts should be on preventing a serious recession. That is a false choice. It fails to recognise that climate change and our carbon reliance is part of problem - high fuel prices and food shortages due to poor crop yields compound today's financial difficulties."
"Being told about the effects of climate change is an appeal to our reason and to our desire to bring about change. But to see that Africans are the hardest hit by climate change, even though they generate almost no greenhouse gas, is a glaring injustice, which also triggers anger and outrage over those who seek to ignore it."
"Europe is dying. That is one of the unsayable truths of our time. We are undergoing the moral equivalent of climate change and no one is talking about it."
"One of the big questions in the climate change debate: Are humans any smarter than frogs in a pot? If you put a frog in a pot and slowly turn up the heat, it won't jump out. Instead, it will enjoy the nice warm bath until it is cooked to death. We humans seem to be doing pretty much the same thing."
"There are plenty of problems in the world, and doubtless climate change - or whatever the currently voguish phrase for it all is - certainly is one of them. But it's low on my list."