Sunlight reaching Earth’s surface isn’t as stable as we might think—it’s actually fluctuated dramatically over the decades due to pollution and clean air efforts. An international team of researchers dug into decades of solar radiation data and found distinct patterns of “dimming” (less sunlight due to pollution) and “brightening” (a rebound as air quality improved). [...]from SciTechDaily https://ift.tt/YeyR0Kv
