Will American ingenuity and entrepreneurship be the key to reducing emissions and solving climate change? In his new book, "Earth: The Sequel," Environmental Defense Fund President Fred Krupp highlights entrepreneurs throughout the United States who have ventured into the clean tech world. Krupp details how these innovators are not only creating solutions to climate change but also establishing successful business ventures. During today's OnPoint, Krupp discusses the book and gives his thoughts on the future the job market as the United States looks to reduce emissions. He addresses concerns over the high cost of researching and developing new technologies and gives his take on the presence of climate and energy issues in the 2008 presidential race.