Tis true. Sun's magnetic field strength is reflected in the sun spot activity. High sun spots/magnetic field, blocks cosmic rays from the earth. Low sun spots/ magnetic field allow increased cosmic ray bombardment of earth. High cosmic rays make more clouds, cool the earth, less cosmic rays gives clear sky and warming. The variable gravitational effects of the planets drive the fluctuations of the sun's magnetic activities, see http://www.landscheidt.info/?q=node/262 Humans have no more effect than fleas on the climate. Enjoy the interglacial. Also, The climate has been cooling from the peak of the Holocene. https://holoceneclimate.com/ Satellite data shows this years temps are not higher than previous years. https://www.nsstc.uah.edu/climate/2021/july2021/202107_Bar.png Th e sun controls earths climate. https://iceagenow.info/geologist-the-sun-not-co2-drives-earths-climate/ CO2 has a short residence time in the atmosphere of about 4 years. https://notrickszone.com/2017/03/26/new-literature-strongly-suggests-co2-residence-time-in-the-atmosphere-is-exaggerated/