re: Who is the leading, most credible, person saying humans are not causing global warming?

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When I was in 8th grade in 1978, we watched a film in class on the evils of fluorocarbons and how they were destroying the ozone layer. 

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Because CFCs were banned in 1987, with the ban starting in the US in 1994. It's impressive to be this ignorant.

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It’s amazing to me that any adult with an IQ above about 115 could believe in man-made*** climate change.

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To deny global historic climate changes is total lunacy. It may be changing ever so slightly as it always has, but we cannot know our own degree of influence because we simply don't have the models for it yet.

We can't predict our own weather with absolute certainty 7 days out. Much less how it will be in 10 years.

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It’s impossible to say humans aren’t contributing to it.

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It's pretty clear to note that a lot of urban sprawl has encircled land base temperature measurement sites, but that's not climate change.

Mother Nature

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It's pretty clear to note that a lot of urban sprawl has encircled land base temperature measurement sites, but that's not climate change.

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It is, and yet it isn’t.

We are affecting the environment which does have an impact on the climate.

IMO though until someone can show me how we get to 40 degrees Celsius for a maximum I’m going to remain unconvinced it’s a problem we need to treat like an emergency.

Common sense things, sure, all for it. Common sense however seems to be in short supply on a distressing number of topics.

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That's a strong take. Do you never seek expert assistance (e.g. mechanic for your car, physician for illness, lawyer for legal problems, etc.?)

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All of those involve physical acts that require a skill. Fixing a car or surgery or drawing up legal documents.. Reading a set of data after inputting potential scenarios doesn't make a scientist credible unless he can prove what he is proposing

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What in the frick are you even talking about? Do you believe I think humans cause global warming? Guess what. I don’t, because I don’t know shite about the issue. I’m trying to read stuff from both sides to try to understand better.

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Okay. If you're asking legitimately, the answer is there are very few "leaders."

Anyone in the scientific community questioning AGW theory is actively shunned. Backing money funding studies dries up. The scientist is discredited. It happens again and again.

Questioning hypotheses is critical and should be routine in science. But in this case, questioners are shutout, and questions are shutdown. That behavior in Science mimics attitudes of Enron, Madoff, or FTX in finance. It should similarly raise antennas.

Take the case of Ivar Giaever.

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Nobel Prize-winning physicist Ivar Giaever resigned as a Fellow from the American Physical Society Tuesday, condemning the group's official stand on global warming.

In 2007, the APS adopted an official statement that emissions of greenhouse gases from human activities were changing the atmosphere in ways that affected the Earth's climate.

The evidence is incontrovertible: Global warming is occurring, the APS stated. If no mitigating actions are taken, significant disruptions in the Earth's physical and ecological systems, social systems, security and human health are likely to occur. We must reduce emissions of greenhouse gases beginning now.

Giaever, an 82-year-old Norwegian, sent an e-mail to APS official Kate Kirby announcing his abrupt resignation. He said he cannot live with the statement on global warming, and said that global temperature had been amazingly stable.

Climate Depot, a site that questions manmade global warming, said it has obtained a copy of the letter.
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Moreover, global warming has become a new religion. We frequently hear about the number of scientists who support it. But the number is not important: only whether they are correct is important. We don't really know what the actual effect on the global temperature is. There are better ways to spend the money, he added.

Giaever is one of the most prominent scientists named in the 2007 Minority Report of the U.S. Senate Committee on Environment and Public Works (updated in 2009) originally citing support of 400 dissenting scientists, and growing to 700. He was also one of more than 100 co-signers in a March 30, 2009, letter to President Barack Obama which criticized his stance on global warming.

LINK

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So here is a Nobel Prize winning scientist holding the AGW hypothesis as dubious, but now he's told this dubious hypothesis is unquestionable fact, and declares that as unacceptable ... as ANY scientist should.

This was the typical response:

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Nobel Laureate Resigns Over Incontrovertible Climate Change Remarks
Ultra right-wing blogs, libertarian news websites, and climate denial organizations were abuzz with the news that a prominent scientist recently resigned from the American Physical Society (APS) over the organization’s assertion that man-made global warming was “incontrovertible.”

This news was treated with reverence for those that have taken contrarian views on the matter of climate change. Best yet, it added a new element: a Nobel-prize-winning scientist was disrupting the perceived consensus on the matter. For them, this must have been Earth-shattering news.

However, a closer look at the news and person may reveal that this wasn’t as Earth-shattering as it appeared. Dr. Ivar Giaever, a physics professor and Nobel laureate, has been a staunch skeptic of anthropogenic global warming (AGW) for years, despite never working in the field of climatology.

This situation illustrates a common misconception held by the public—and lately touted by climate change deniers—that all scientists are experts in all things “science.” In truth, there is a growing list of disciplines in science, medicine, and engineering. It is a rarity (but not an impossibility) for a scientist to specialize in a field outside his or her expertise.

As mentioned, this only leads to more questions about Dr. Giaever’s motives.
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As of 2017, Dr. Giaever isn't going away. Thanks to the Internet, his speeches are found on YouTube and are being passed along by climate change deniers. Even the conservative writer George Wills referenced him in an opinion piece for The Wall Street Journal. That particular column has been re-published in numerous print and Internet media sites since 2014.

Also, there's still no indication that Giaever has looked at the data or has been part of any climatology studies.

LINK

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Who is the leading, most credible, person saying humans are not causing global warming?

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The smart ones

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My guess is you are a believer that smoking CAUSES cancer because you are to ignorant to do your own analysis lol

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I’m listening and waiting for your analysis