It's Not the Sun
Solar levels have not changed significantly over the past two hundred years, showing how the sun is not responsible for climate change.
Solar radiation levels haven't changed
Solar radiation levels have not changed significantly since the 1970s. Furthermore, the small increases that have occurred since the 1600s have been offset by a more recent decrease in the late 1900s.
Scientists use satellites for constant and accurate measurements
To make sure that their measurements are accurate, scientists use state-of-the-art satellites that take measurements from the top of the atmosphere. Their location ensures that scientists get the most direct readings of solar radiation levels.