Less than 10 % of global warming during the 20th century was due to changes in solar activity, new research has found.
It had been speculated that during periods of high activity, energy from the sun may have blocked outside cosmic rays.
These cosmic rays are known to encourage the formation of clouds, which reflect the sun’s rays away from Earth and subsequently cool the planet.
But the study found there was only a small link between changes in the sun’s activity and global warming.
Read more at University of Lancaster, University of Durham