What does global warming have to do with history?
During the total history of the earth (over billions of years) there have been many changes to the climate. Most of these are reasonably well understood. For instance the sun becomes 10% brighter every million years. The atmosphere originally had a much higher concentration of CO2 than today which was fortunate because with a dimmer sun there would have been no liquid water without a major greenhouse effect. The development of plant life resulted in a reduction of CO2 and a build up of fossil fuels. We are now burning those fossil fuels which is increasing the greenhouse effect but we now have a much hotter sun,
More recently there have been variations to the earths orbit and its orientation caused in part by the gravitational effects of Jupiter and Saturn. These minor variations caused major variations in earth's climate including the Ice Ages. This indicates that climate sensitivity is quite high, so that changes caused by increasing CO2 in the atmosphere are likely to be amplified rather than reduced as a result of feedback.
The most valid way to study global warming is through history. Scientists observe the past occurances of climate, environment, atmosphere, etc., to understand the way global warming is developing over time. To gain the most insight on global warming, it would be wise to work alongside someone who is studying it themselves. Global warming is simply a matter of tracking trends and analyzing patterns to make inferences. If you are doing this, you are studying…
Spencer Weart wrote the book, "The Discovery of Global Warming", which tells the history of climate change research as a single story. He has also set up a website, "The Discovery of Global Warming", where you will find a more complete history in dozens of essays on separate topics, occasionally updated. Here is the link to his website. https://www.aip.org/history/climate/index.htm
True global warming does not decrease temperatures. So, either the model for global warming's effects is hokus-pokus, or global warming as presently claimed, does not exist. Some global warming followers will have you believe that global warming makes the weather "act crazy". If true, then it is not really global warming, is it.
Everything continues to global warming. You breathing, contributes to global warming. Me typing this response contributes to global warming. Toilets contribute to global warming because they are a manufactured product. Anything Manufactured requires energy and materials , all of which contribute in some way, even if minor to global warming.
"Climate Change" and "Global Warming" are not the same, though related. Global Warming causes Climate Change. With Global Warming we understand the warming of the earth's global temperature. That warming has in turn an effect on the earth's global climate and on more localized climates (like the climate of England or Western US).
I do not think that global warming is a myth. There are some who debate the reality of global warming, and others accept that it is happening but deny that humans are substantially responsible for global warming, but these debates simply prove there must be something to it. Global warming is no myth.