Seventy days before the international climate summit in Copenhagen, hundreds of government officials and business leaders met in New York City on Monday to kick off Climate Week. On Tuesday, President Obama affirmed his commitment to action when he spoke to the United Nations General Assembly at the UN Climate Summit. Despite delays in passing a cap-and-trade bill, Obama highlighted U.S. efforts to curb climate change over the past year, including stimulus investments in renewable energy and efficiency, extension of tax credits for renewable energy, new automobile emissions standards and partnerships with other major emitters like China and India. Kate Sheppard of Mother Jones reports that Obama pledged to also address climate change with other leaders at G20 meetings later in the week.