https://countercurrents.org/2018/04/20/are-harmful-ultraviolet-c-and-increased-amounts-of-ultraviolet-b-reaching-earths-surface/
The study is titled ‘Deadly Ultraviolet UV-C and UV-B Penetration to Earth’s Surface: Human and Environmental Health Implications’. The study’s authors are J. Marvin Herndon, Raymond D. Hoisington, and Mark Whiteside. The paper was published on March 30, 2018, by Journal of Geography, Environment and Earth Science International. [1]
This study points out that a previous study, from 2007, (D’Antoni et al. 2007) also found that UV-C and more UV-B than expected were reaching Earth surface, and that the previous study had inexplicably not been followed up on, to determine its validity.
The recent study by Herndon et al. may help in part to explain a mysterious and extremely ominous recent-years change to Earth environment: the puzzling mass death or massive reduction of many lifeforms in many parts of the planet.