As the State of the Planet 2010 conference approaches, we will be updating our blog with the latest information on sessions and speakers. This week, we are thrilled to announce the addition of speakers President Felipe Calderón of Mexico as well as Sanjeev Chadha, chairman of PepsiCo India; Achim Steiner, executive director of UNEP; and Peter Weirenga, executive vice president and CEO of Philips Research. See the Speakers section for more on these and the rest of our participants, and stay tuned for more updates.