You are the advisor for environmental issues for a senator in Washington DC. The senator wants to introduce a bill to create a national cap-and-trade system to reduce greenhouse gas emissions and meet the Paris Climate Accord goal

You are the advisor for environmental issues for a senator in Washington DC.  The senator wants to introduce a bill to create a national cap-and-trade system to reduce greenhouse gas emissions and meet the Paris Climate Accord goals.  Please provide a critical overview of relevant case studies in the US and worldwide.  How have these policy approaches worked?  Did they achieve the policy goals?  What were the main obstacles and problems during implementation? 

Please develop a short memo [2‐3 pages] discussing your summary and also provide a short elevator pitch in favor of a US cap-and-trade system [Think: what are the three most important issues the senator should tell colleagues when meeting them in the gym/cafeteria/etc].