Discussion #1 - Global Warming/Externalities Global warming is a situation with massive externalities. The independent actions of billions of people affect the lives of billions of people - you and I included. We both affect and are affected by global warming. Make an original discussion post addressing these points: How seriously do you consider the threat of global warming? What are the likely impacts? Off the top of your head, what do you think are the top three causes? Pick one key contributor that has serious externalities affecting global warming and explain what you think should be done to mitigate the effects. Try to be as specific as possible within reason. Pick one way you contribute to global warming that arises from externalities and explain what you think you or others should do to mitigate the effects. Again, try to be as specific as possible within reason