Climate change\Global warming Denier Myth Busting 2. Attempting to spread truth.

"Global warming is a recent hoax, a con trick, designed by lying climatologists to get funding." bleat the deniers.

Not so and any such accusation is the result of ignorance or deliberate deceit.

Any rational study of the historical evidence shows a growing worry, about the influence of CO2, among people who had no vested interest in over-hyping the problem:

1896 Svante Arrhenius (1859–1927), Swedish physical chemist and 1903 Nobel laureate, publishes first calculation of global warming from human emissions of CO2.

1938 English engineer Guy Callendar argues that CO2 greenhouse global warming is underway. Published 10 major scientific articles, and 25 shorter ones, between 1938 and 1964 on global warming, infra-red radiation and anthropogenic carbon dioxide.

1956 Canadian Gilbert Plass calculates that adding CO2 to the atmosphere will have a significant effect on the radiation balance.

1957 American Roger Revelle finds that CO2 produced by humans will not be readily absorbed by the oceans.

1960 Charles Keeling accurately measures CO2 in the Earth's atmosphere and detects an annual rise.

1963 Calculations by Fritz Möller suggest that feedback with water vapor could make the climate acutely sensitive to changes in CO2 level.

Same year meeting on “Implications of Rising Carbon Dioxide Content of the Atmosphere” was convened by the private Conservation Foundation.

1965 U.S. President’s Science Advisory Committee reported that “By the year 2000 the increase in atmospheric CO ... may be sufficient
to produce measurable and perhaps marked changes in climate...”

1970 Massachusetts Institute of Technology study on
“Man’s Impact on the Global Environment,” suggested that greenhouse warming might bring “widespread droughts, changes of the ocean level, and so forth,”

1977 report on “Energy and Climate” from a panel of geophysicists
convened by the U.S. National Academy of Sciences stated there would be
“significant effects in the geographic extent and location of important commercial fisheries... marine ecosystems might be seriously disrupted.” Stresses on the polar ice caps might lead to a surge of ice into the sea, bringing a “rise in sea level of about 4 meters within 300 years.”

1983 study by the U.S. Environmental Protection Agency, studied sea-level rise. The experts concluded that by the end of the 21st century they “could confidently expect major coastal impacts, including shoreline retreat... flooding, saltwater intrusion, and various economic effects.”

Such concerns accelerated during the 80s, resulting in the formation of the IPCC. Their conclusions were difficult to reach and based on a vast array of data.

A conclusion that the observed warming is the result of human induced modification of the atmosphere is a rational one, based on the work of generations of scientists. That does not logically indicate that it is the correct conclusion, since not all evidence is available at all times, but it is a rational conclusion given the available evidence. That is how science works. Any accusation of deliberate, wide-spread conspiracy to deceive is irrational and either the result of historical ignorance or deceit.