People who believe vaccines cause autism (today) are fanatics.
People who deny climate change is happening (today) are fanatics.
1 The climate record started in 1800 which was one of the coldest periods in history - 1816 is popularly called the year without a summer and there had been a little ice age that started in the 1600s and ended during the 1800s (of course it's been rapidly warming since then)
2. Recent NASA observations show glacial retreat and warming on Mars that happened exactly at the same time as global warming on earth suggesting possible solar origion of climate change rather than human caused.
3. I have yet to see a single piece of evidence that conclusively links a warming climate with human released CO2. All we are told is that CO2 makes things warmer and that humans are releasing more CO2 than before. That's not enough, for climate change to be plausable they have to show that human released CO2 is enough to make a meaningful impact on atmospheric composition such that it makes the earth warmer. I don't think we have enough understanding of how atmosphere behaves or even of how much gases we are releasing to make those kinds of conclusions.
1. https://en.wikipedia.org/wiki/Year_Without_a_Summer
2 http://www.washingtontimes.com/news/2016/may/31/mars-also-un...
now my purpose isn't to get into a debate on climate change here, all I want to demonstrate is that the people who deny man made climate change aren't crazy or fanatical, they are ordinary rational people that for whatever reason have reached a different conclusion and we should not be so quick to dismiss them. The hallmark of rationality is willing to inquire and debate for the validity of opinions, not dismiss opinions outright as fanatical or crazy without at least looking at the other side's evidence.
Many are, until recently the most common talking point was "it's cooled since 1998".
1. We have temperature data going back lot further than that, just not direct measurements.
2. Mars has an extremely different atmosphere than ours, Our only commonality is the sun which is actually in a cool period.
3. Can you propose a better explanation for the observed warming? It's a massive amount of energy that has to come from somewhere. When there is a theory that fits the data and you want to challenge that then you need a better theory. Galileo faced the same problem.
Now, I don't know much about climate change either, so I googled it. The IPCC 2007 report outlined how the last 20,000 years of glacial record show a warm period very similar to the four warm periods in the 600,000 years prior. However, the CO₂, CH₄, and N₂O levels in the last 250 years have continued to rise beyond the normal peak, currently exceeding previous records by over a full range. So it's evident that something has been releasing unprecedented levels of greenhouse gases in the remarkably short time since the industrial revolution.
As for CO₂ in particular, it's merely the most direct byproduct of burning wood, coal, and oil. It's not the strongest greenhouse gas, it is the simplest causal link between the massive sustained burning of carbon and vast quantities of CO₂ spontaneously appearing. If you want to know more about how CO₂ is a greenhouse gas, I'll be happy to google that, too.
What is a full range? does that have a number, is it a million kg per year? 5 million? And how does that compare to the actual atmosphere composition given that the atmosphere forms a 300 mile thick radius around the entire planet. Is the amount of greenhouse gases released by humans enough to make a dent in something large enough to form a 300 mile thick layer around the planet? Lets face it - you and climate science doesn't have the answers to these questions and until it does it will remain a hypothesis.
