Hardline lefty, meteorologist, Masters in Astrophysics Piers (brother of Jeremy) Corbyn explains climate change
It's all about wealth distribution through climate activism. Simple really.
Some background thanks to Wikipedia
Early life and education
He began recording weather and climate patterns at the age of five, constructing his own observation equipment. He attended Castle House School and Adams' Grammar School in Newport, Shropshire. At 18 he went to Imperial College London, being awarded a first class BSc degree in physics in 1968. He commenced postgraduate research there into superconductivity, but then went into student representation and politics for some years. In 1979 he returned to postgraduate study at Queen Mary College, University of London, being awarded an MSc in Astrophysics in 1981.