A surprising idea for solving climate change David Keith. Yovisto Academic Video Search. Environmental scientist David Keith proposes a cheap, effective, shocking means to address climate change: What if we injected a huge cloud of ash into the atmosphere to deflect sunlight and heat? TED - Technology, Entertainment, Design Environmental scientist David Keith proposes a cheap, effective, shocking means to address climate change: What if we injected a huge cloud of ash into the atmosphere to deflect sunlight and heat? change klimawandel 1953 climate growthrate co2 kohlendioxid athmosphere acceleration wachstum beschleunigung überproportional melting pol sea polareis arktis nordpol arctic ice schmelzen erwärmung blabla cartoon problem solution lösung system deal geoengineering stop emission mount pinatuba ulkan vulkanausbruch philippinen bomb atomic wolke cloud abkühlung cooling vulcano mystery side effects ozone ozonschicht layer models klimamodell president johnson 1956 paul vrutzen policy stratosphere sulfur crutzen incection albedo dilemma enhancement essay nobel chemistry chemie prize press coverage economist dr strangelove solarmühle toy childs spielzeug aerosol effect particle teilchen sonnenlicht sunlight photophoresis photophorese molecules gas force pole südpol antarktis idea knowledg that possibl ime 4ta mpa lka str wrv solar lie jfg iii 2xco ldv solar ivy hilt ill fig rug qii human climat chang syst ebe and than model tit ill peopl