如果您無法觀看此影片,您的瀏覽器可能不支援 HTML5 視訊技術
要觀看此影片必須開啟 JavaScript,請確認瀏覽器已經設定正確supports HTML5 video
In this Ted Talk, Bill Gates says CO2 causes ecosystem collapse, and top scientists tell him we have to get CO2 emissions down to zero. He then goes on to say that we need to reduce population, and we can use new vaccines to do that.