Our climate is a delicate matter, a regional change in one part of the world may have cascading effects for the system as a whole. Thus, it is of vital importance to keep track of changes, in real-time and over longer periods of time.
There is a wide variety of organizations around the world that do a diligent job of measuring and collecting climate related data points.
We currently aggregate and keep record of atmospheric data from NOAA (National Oceanic and Atmospheric Administration) in the United States. This includes measurements of atmospheric contents for Carbon Dioxide (CO₂), Methane (CH₄), Nitrous Oxide (N₂O), and Sulfur Hexafluoride (SF₆) collected from various stations around the world.