In his speech at the Copenhagen Climate Change Conference, President Obama told leaders from around the world that “the time for talk is over.†Obama pushed for all major economies to reduce greenhouse gas emissions but admitted some doubt as to whether a collective agreement would be reached. He could offer no concrete plans and nothing more than confidence that cap and trade legislation would be signed into law next year in the United States. While the focus of his speech was primarily on what actions the United States government was undertaking, he stressed that climate change should be addressed...