Fritz Vahrenholt's Climate Apostasy Partly Due to Solar Research of Henrik Svensmark

So says journalist and film-maker Michael Miersch for Germany's FOCUS, as translated by Phillip Mueller in "Solar Shift Rocks Germany", here:

The work of the Danish researcher Henrik Svensmark and other climate scientists convinced him that the fluctuating magnetic field of the sun is a driver of climate change, because it shields cyclically more or less cosmic radiation from the earth. This particle radiation from space contributes to cloud formation.