The warnings about global warming have been extremely clear for a long time. We are facing a global climate crisis. It is deepening. We are entering a period of consequences. - Al Gore
There are very few objections to the theory as a whole; everyone in the scientific community agrees that the atmospheric concentration of carbon dioxide is on the rise, and almost everyone believes that it cannot help having some effect. To declare, as some editorialists have done, that the warming has not yet appeared and therefore the theory is wrong is like arguing that a woman hasn't yet given birth and therefore isn't pregnant. - Bill McKibben
Two thousand scientists, in a hundred countries, engaged in the most elaborate, well organized scientific collaboration in the history of humankind, have produced long-since a consensus that we will face a string of terrible catastrophes unless we act to prepare ourselves and deal with the underlying causes of global warming. - Al Gore
We are in a race against time. Newspaper and magazine articles, television specials, and film documentaries all predict a terrible future: global warming will bring to the world melting ice sheets, flooded coastal regions, powerful hurricanes, droughts, and dislocated populations. In a recent study, the Pentagon described the famine, widespread rioting, and even war we can expect as nations defend their dwindling food, water, and energy supplies. - Brian Dumaine
We have many advantages in the fight against global warming, but time is not one of them. Instead of idly debating the precise extent of global warming, or the precise timeline of global warming, we need to deal with the central facts of rising temperatures, rising waters, and all the endless troubles that global warming will bring. We stand warned by serious and credible scientists across the world that time is short and the dangers are great. The most relevant question now is whether our own government is equal to the challenge. - John McCain
We wield an enormous influence over the world through how we choose to vote and what we choose to buy. Again, it's the power of numbers. If voters hold their leaders responsible for doing something about global warming, it will get done. If most people refuse to buy products from companies that, for example, wrap products in more plastic than necessary, pretty soon the plastic wrapping will stop. - Anthony D. Barnosky
Yes, there is still much about global warming we have to learn and research should continue. But the longer we delay, the more CO2 will build up in the atmosphere. It stays there a long time. If we wait too long before acting, we will pass a point of no return and lock ourselves into centuries of global warming. We could pass one of those dangerous tipping points that could make life very difficult. It's a risk we shouldn't take. - Jim Dipeso
On the other hand, there are those who think that …
Global warming is indeed a scam, perpetrated by scientists with vested interests, but in need of crash courses in geology, logic and the philosophy of science. - Martin Keeley
Some of the scientists, I believe, haven’t they been changing their opinion a little bit on global warming? There’s a lot of differing opinions and before we react I think it’s best to have the full accounting, full understanding of what’s taking place. - George W. Bush
Most people have very busy lives and simply are not exposed to the real facts about what is happening. It’s much easier to pretend it’s not happening when you can’t see, on very short time scales, the actual impacts. Coupled with this psychological reality is the fact that society ‘is now’ rather than in the future. The inertia in the Earth System means that behaviour today will have significant impacts tomorrow, or the day after tomorrow, rather than being immediate. The most serious impacts of climate change today are not seen by most people in the western world as few venture into the developing world, or the poles, where most of the action is. This, coupled with the fact that it is rarely possible to directly link climate change to a specific event in a specific place, all helps to seed doubt into many minds. The final ingredient in this story is a tiny minority of people and organizations who deliberately provide disinformation and set out to confuse people, for their own ends. The coal and oil industries among others have repeatedly demonstrated their credentials in this area. The result is that normal intelligent people are confused, and rather than take on what seems to be a daunting challenge, will tend to walk away from the question. - Neil Hamilton
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