Paul Jozef Crutzen (Dutch pronunciation: [pʌul ˈjoːzəf ˈkrɵtsə(n)]; 3 December 1933 – 28 January 2021) was a Dutch meteorologist and atmospheric chemist. He was awarded the Nobel Prize in Chemistry in 1995 for his work on atmospheric chemistry and specifically for his efforts in studying the formation and decomposition of atmospheric ozone. In addition to studying the …

Kenneth Joseph Arrow (23 August 1921 – 21 February 2017) was an American economist, mathematician, writer, and political theorist.He was the joint winner of the Nobel Memorial Prize in Economic Sciences with John Hicks in 1972.. In economics, he was a major figure in post-World War II neo-classical economic theory.Many of his former graduate students have gone on to …