There are still some naysayers who profess that global warming is a myth. However the overwhelming majority of scientists conclude the planet is warming because of man's behavior. The evidence and science is continually gaining strength.  We need to hear what they have to tell us - the alternative could be costly to our children and grandchildren and future generations.
Tipping Points' may arrive without warning, says top forecaster - link
May 2007 - NASA puts Global Warming Tipping Point within 10 years - link
(more on Tipping Points at foot of page)

"Make no mistake, global warming is happening right now.   It is only going to get worse. My generation has failed - we are handing over the problem to our children. They, and their children, will live with the worst consequences of climate change. What we need more than anything else is a mass movement of young people."  Peter Goldmark, retiring from Environmental Defense Fund Climate & Air Program at the end of this year. link   

The governor of the Bank of England, Mike Carney, warns that climate change will lead to financial crises unless the world’s leading countries do more about their current and future carbon emissions. “The challenges currently posed by climate change pale in significance compared with what might come.” link


Professor Kevin Anderson:

 “We are almost guaranteed to reach 4 degrees of warming, as early as 2050, and may soar far beyond that – beyond the point which agriculture, the ecosystem, and industrial civilization can survive.” link

Nicholas Stern - "Climate change is here now and it could lead to global conflict. Extreme weather events in the UK and overseas are part of a growing pattern of global change that it would be very unwise to ignore."   - link  

Scientist Sir Robert Watson, who chaired IPCC from 1997 until 2002 ~ "All the promises in the world, which we're not likely to realize anyway, will not give us a world with only a 2C rise. All the evidence, in my opinion, suggests we're on our way to a 3C to 5C world."   link

The conversion of a climate-change skeptic
. "Three years ago I identified
problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming. Following an intensive research effort involving a dozen scientists, I concluded that global warming was real - I'm now going a step further: Humans are almost entirely the cause."  - Richard Muller - link                    

"In the past few centuries, atmospheric carbon dioxide has increased by more than 30%, and virtually all climatologists agree that the cause is human activity, predominantly the burning of fossil fuels, and to a considerable extent, land uses such as deforestation."  Stephen Schneider, professor for Interdisciplinary Environmental Studies at Stanford University - died July 2010   


"Those that have opposed a deal on climate, which would include elements of the fossil fuel industry, have clearly made making a 2C target much, much harder, if not impossible. They've clearly put the world at risk of far more adverse effects of climate change." Prof. Bob Watson, UK chief scientist at the department for environment and rural affairs.

Climate change over the next 20 years could result in a global catastrophe costing millions of lives in wars and natural disasters. (THE PENTAGON REPORT ON CLIMATE CHANGE: An Abrupt Climate Change Scenario and Its Implications for United States National Security)
See more

James Hansen August 2012 "Our analysis shows that it is no longer enough to say that global warming will increase the likelihood of extreme weather .... to the contrary, our analysis shows that, for the extreme hot weather of the recent past, there is virtually no explanation other than climate change." link  “I think we have a very brief window of opportunity to deal with climate change ... no longer than a decade, at the most,”  James Hansen  - Head of the NASA Goddard Institute for Space Studies. (Link to editorial by James Hansen.)

"We have to deal with greenhouse gases . . . From Shell's point of view, the debate is over.
When 98 percent of scientists agree, who is Shell to say, 'Let's debate the science'?” John Hofmeister, president of Shell Oil Co. at the National Press Club.   Washington Post - November 25 2006    link

 Humans are too stupid to prevent climate change.
"I don't think we're yet evolved to the point where we're clever enough to handle a complex a situation as climate change." In an issue as severe as a war, "it may be necessary to put democracy on hold for a while." more
Planet Earth is unwell, argues James Lovelock. Emissions of greenhouse gasses  and other environmental changes have, he says, brought humanity and the natural world to the edge of crisis. James 
- Author of the GAIA theory   [more]  

"Rio Tinto believes that emissions of greenhouse gases from human activities are contributing to climate change and that avoiding human caused changes to the climate is an important international goal."  Testimony of Preston Chiaro on behalf of Rio Tinto, second largest coal producer in USA, to Senate Climate hearings - October 2009:

Tipping points - or the "Point of no Return':  Scientists widely agree that global climate change is already causing major environmental effects, such as changes in the frequency and intensity of precipitation, droughts, heat waves and wildfires; rising sea level; water shortages in arid regions; new and larger pest outbreaks afflicting crops and forests; and expanding ranges for tropical pathogens that cause human illness. And they fear that worse is in store. Many scientists are looking for the warning signs that herald sudden changes in natural systems, in hopes of forestalling those changes, or improving our preparations for them," said UC Davis theoretical ecologist Alan Hastings. "Our new study found, unfortunately, that regime shifts with potentially large consequences can happen without warning - systems can ‘tip’ precipitously. "This means that some effects of global climate change on ecosystems can be seen only once the effects are dramatic. By that point returning the system to a desirable state will be difficult, if not impossible."  link

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