To The Daily Sun,
According to NASA website , "Multiple studies published in peer-reviewed scientific journals show that 97 percent or more of actively publishing climate scientists agree: Climate-warming trends over the past century are very likely due to human activities.  In addition, most of the leading scientific organizations worldwide have issued public statements endorsing this position."By listening to the constant drumbeat of the radical free enterprise fundamentalists, you wouldn't think that its been largely settled by climate scientists. As with vaccines and evolution, there is no controversy regarding anthropogenic climate change in the world of climate scientists. See Graph 
A recent book titled the "Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming"  tells the story of how an elite group of political ideologues and scientists distorted and misrepresented and outright became liars for hire to fight the cigarette cancer connection, acid rain due to sulfate aerosols from coal-fired plants, the ozone hole depletion from fluorocarbons, the science of the nuclear winter, anthropogenic climate change and even revised an attack on Rachael Carlson's "Silent Spring" and subsequent banning of DDT.
Russ Wiles' buddy, eternal anti-communist, cold-warrior, doubt-monger Fred Singer is featured throughout the book in most of the stories; denying the dangers of acid rain, ozone depletion, SDI, a winnable nuclear war and the subsequent nuclear winter, second hand smoke, and anthropogenic climate change. In every case his claims were scrutinized, debunked, and thoroughly dismissed as bogus, dishonest and politically motivated. After all, Singer's gang was made up of lobbyists, economists, industry representatives, other corrupt scientists for hire, right-wing think tanks and the media. Joseph Romm, a Washington scientist and author, after hearing Singer's 1,500-year cycle theory said, "I don't think there's anybody in the scientific community who takes Fred Singer seriously."
As Justin Lancaster, who worked with climatologist Roger Revelle claimed, "Fred Singer is the most unethical scientist, in my opinion, that I have ever met. I said so in the early 1990s, publicly, and I am still confident in the truth of this statement." Right before his death, Revelle remarked to his secretary, "Some people don't think Fred Singer is a very good scientist."
When "Merchants of Doubt" was made into a documentary to be released in theaters March - June 2015, Fred Singer was furious and threatened libel and sought out allies with which to block the movie. Of course he doesn't want people to find out who really is, what he does in his ideologically pigheaded way, and how he did these deceitful things for the sake of protecting big industry, their profits and their regulatory status quo. He failed to intimidate anyone working with the movie. It opened in March, closes in June and then goes to streaming services. The book is awesome. Very fast summer reading, too.
Being such a small minority, the clique of arrogant ideologues that are the climate deniers have lost this battle in the world of science but in their half century fashion, continually repeat all the things in the mass media and the internet that have already been debunked by climate scientists. After all, Fred Singer is a Cold War physicist not a trained climatologist no matter how much he or his glassy eyed followers protest. For a side by side chart of scores of Singer's absurd claims answered by what the science says go to this page at Skeptical Science. 
 http://www.merchantsofdoubt.org/ Kindle at Amazon, too.