It should be pointed out here, that the amount of change in downward heat radiation from changes in cloud cover in the experiment, are far greater than the gradual change in warming
provided by human greenhouse gas emissions, but the relationship was nevertheless established.
«Climate science» as it is used
by warmists implies adherence to a set of beliefs: (1) Increasing
greenhouse gas concentrations will warm the Earth's surface and atmosphere; (2)
Human production of CO2 is producing significant increases in CO2 concentration; (3) The rate of rise of temperature in the 20th and 21st centuries is unprecedented compared to the rates of change of temperature in the previous two millennia and this can only be due to rising
greenhouse gas concentrations; (4) The climate of the 19th century was ideal and may be taken as a standard to compare against any current climate; (5) global climate models, while still not perfect, are good enough to indicate that continued use of fossil fuels at projected rates in the 21st century will cause the CO2 concentration to rise to a high level
by 2100 (possibly 700 to 900 ppm); (6) The global average temperature under this condition will rise more than 3 °C from the late 19th century ideal; (7) The negative impact on humanity of such a rise will be enormous; (8) The only alternative to such a disaster is to immediately and sharply reduce CO2
emissions (reducing
emissions in 2050
by 80 % compared to today's rate) and continue further reductions after 2050; (9) Even with such draconian CO2 reductions, the CO2 concentration is likely to reach at least 450 to 500 ppm
by 2100 resulting in significant damage to humanity; (10) Such reductions in CO2
emissions are technically feasible and economically affordable while
providing adequate energy to a growing world population that is increasingly industrializing.
Together, these lines of evidence
provide a conceptual and scientific backing to the theory of climate change caused
by human greenhouse gas emissions that is simply absent for alternative theories, such as that there is no change or that the change is caused
by something different.