So climate change is a hoax. Excellent.
I don't believe the small amount of warming we've added has changed the climate.
"The scientific study of the climate is not very old. Compilations of global temperature data started in the 1870s, and not until 1963 did J. Murray Mitchell bring together information from hundreds of weather stations around the world to build a modern representation of Earth’s temperature. His work suggested a steady increase in global temperatures from around 1880, followed by a cooling of the planet from about 1940. In addition, satellites of the early 1970s spotted more snow and ice across the Northern Hemisphere, and people were well aware of unusually harsh winters in North America during 1972-73.
Consequently the suspicion of a cooling world spread among a small number of researchers, but a close look at the data revealed flaws in such a conclusion. The cooling was regional, confined mainly to the Northern Hemisphere, whose chilly temperatures tugged down the world averages. In other parts of the world, temperatures continued to climb. Air pollution and the use of aerosols, reduced by legislation to come in the 1970s and ‘80s, may also have been a factor.
Some years before, scientist Charles David Keeling, measuring the atmosphere from posts atop Mauna Loa and in Antarctica, launched an investigation of changes in the levels of carbon dioxide. By 1965 he had found that CO2 was rapidly increasing. A presidential scientific advisory committee that same year advised that a calamitous rise in temperatures worldwide, from CO2-related emissions, could result.
All climate change deniers needed was one article to cast doubt on the science of global warming.
longreads.com
How prevalent then were worries about global warming? An examination of peer-reviewed scientific literature conducted by a group of researchers in 2008, covering the mid-1960s through the 1970s, revealed that papers warning of global warming outnumbered those projecting cooling by a factor of six. So climate change in the form of global warming was a widespread topic of concern during this era, and there was no consensus that the Earth would cool in the immediate future.