I agree with you in one sense when you say the following:

The inaction of those who deny the reality is a much bigger problem than environmental extremism.

Your charts are impressive and I would not dispute any of the information in them, but what seems somewhat disturbing to me is that the charts do not display the increase in the level of the background radiation.
As I understand it, the background radiation has increased since the first nuclear explosion on July 16, 1945, when the atomic bomb was tested at Trinity.
The background radiation has many other sources than the nuclear disintegration of atoms, but I believe that the "increase" of the background radiation is due to the radioactive atoms that have been released into the atmosphere by human activity. The amount of radioactive atoms floating in the atmosphere has increased since the first atomic bomb was detonated. Not only did the nuclear bomb testing spew radioactive atoms into the atmosphere, but also various nuclear power plants all over the world have discharged radioactive atoms into the atmosphere. The more famous disasters were the Chernobyl and the three mile island accidents, but there have been hundreds if not thousands of other accidents that have not been reported. All these occurrences have contributed to the increase of the background radiation.

Increase in the background radiation is bad, not only because it can cause deformities in the unborn animals and humans, but if the energy, such as gamma rays and free neutrons, that are caused by the disintegrating atoms, build up to a great enough magnitude, then a variety of other more sinister effects will become apparent.

The inaction is that no one seems to have any proper measurements on the increase of the background radiation, and the denial is that no one even considers the increase of background radiation to be harmful.