"During the 20th century great changes occurred in physics such as relativity and quantum mechanics. which describes the physical properties of nature on the molecular, atomic, and subatomic level.
Quantum mechanics led to the field of physics called Atomic, Molecular, and Optical Physics (AMO), which enabled the development of databases that can be used to directly calculate the greenhouse effect in the atmosphere. [EN 9]
Using the HITRAN database, AMO authorities W. A. van Wijngaarden and W. Happer have estimated the influence of water vapor, carbon dioxide, ozone, nitrous oxide, and methane in a cloud free atmosphere to increase global temperatures.
Under current atmospheric conditions, increasing water vapor and carbon dioxide have a minimal effect on temperatures.
At last, we have calculations that agree with measurements of what is occurring in the atmosphere. [EN 10]"