Monthly Archives: May 2019

LNT model adopted for regulatory convenience

E.J. Calabrese. EPA adopts LNT: New historical perspectives. Chemic-Biological Interactions 308 (2019) 110-112

This paper provides an historical assessment of how the linear non-threshold (LNT) model became adopted as policy by the United States Environmental Protection Agency (US EPA) in 1975 [1] and how prior United States National Academy of Sciences (US NAS) radiation advisory panels may have affected this EPA decision. The paper highlights a generally unrecognized set of recommendations of the 1960 Biological Effect of Atomic Radiation [2] Genetics and Medical/Pathology Panels that did not support LNT for cancer risk assessment due to their judgements of its scientific limitations and unacceptable uncertainties. These convergent, independent and high profile recommendations were not promoted by the sponsors (i.e., Rockefeller Foundation and the NAS), and were ignored by the media, Congress and the scientific community in contrast to the vast attention directed to the linearity recommendation for germ cell mutation by the BEAR Genetics Panel in 1956 [3,4]. The subsequent Biological Effects of Ionizing Radiation (BEIR) I Committee (1972) [5] report ignored these BEAR Panel (1960) [2] recommendations, only commenting on the BEAR 1956 linearity supporting recommendation [3,4]. These actions are documented and assessed for how they influenced why and how EPA adopted linearity for cancer risk assessment based on the BEIR I report.

“Climate science” snow predictions are unreliable, not science-based

Past climate doom predictions have been soundly refuted by climate science

“If you liked last summer’s record temperatures, you’re going to love the 1990s, says James Hansen, the NASA scientist who, during congressional hearings on the Midwestern drought, linked greenhouse warming to the heat wave. Last summer was a preview of the average summer 10 years from now, and the hottest summers during the ’90s will be even hotter and drier than the one we just struggled through, he says.” click here

The overpopulation myth

“Who says the world is overpopulated? And what does that mean anyway? Hunger?  Crowding? Environmental harm?  For over 200 years we’ve been told that the world is overpopulated. But is it? Check this out.” click here

Democrats rely on name-calling (not science) at Natural Resources Committee hearing


Severe drought absent from continental US


Record cold US temperatures

“Since October 1 (start of the water year) afternoon temperatures have been second coldest on record.” click here