Enhancing voluntary collaboration on cooling through the G20 Noura T. Al-Saud, Mashael Al Shalan, Thamir Al Shehri, Mazhar Bari, Maxime Beaugrand, Nicholas Howarth, Radhika Khosla, Moncef Krarti, Alessandro Lanza, Benoit Lebot, Karan Mangotra, Natalia Odnoletkova, Tadeusz Patzek, Yamina Saheb Policy Brief