The Ozone Hole problem is primarily caused by which substances?

Isaac Newton formulated universal gravitation, showing that bodies attract with a force proportional to mass and inversely to distance squared.

The Great Barrier Reef, the world’s largest coral reef system, lies off Australia’s coast, stretching over 2,300 kilometers.

Alan Turing laid foundations of computation and artificial intelligence, creating the Turing Machine model and breaking wartime codes.

Magna Carta established legal limits on King John of England, becoming a foundation for constitutional law and parliamentary rule.

Frederick Banting and Charles Best discovered insulin in 1921, revolutionizing treatment of diabetes and saving millions of lives.