新興媒介議題往往反映出人類社會變遷的種種現象，而全球暖化及《京都議定書》為21世紀國際間最被關注與熱烈討論之環保議題。為因應暖化問題、《京都議定書》生效以及環保意識風潮，本研究擬從傳播角度，以內容分析法探討美國《紐約時報》如何報導全球暖化及《京都議定書》之相關議題及其核心框架。研究發現，《紐約時報》報導全球暖化及《京都議定書》議題之生命週期演進，在2001-2007年期間由緩和下滑至急遽上升的趨勢。媒體關注面向從「國際政治」轉而關心「環保教育」層面，並從過去的消極不看好，逐漸轉為採取正面的態度處理。 New issues covered by the media frequently reflect various phenomena demonstrated as results of human social changes. Global Warming and Kyoto Protocol are both environmental protection related issues and have been widely discussed in the 21st century. In response to the Global Warming, Kyoto Protocol, and environmental awareness trends, discussions from various viewpoints of mass media was conducted in this study to analyze how foreign media cover news reports on Global Warming and Kyoto Protocol related issues and their core frame. The results indicated that the report of media at concerning Global Warming and Kyoto Protocol issues, presented a trend of which changed from steady decrease to drastic increase between 2001-2007. As the issues took their effects, the frame of media turned from “international politics” into “environmental protection education” aspect. They also changed from passivity to activeness in terms of their attitude in handling the matters.