Front Matter -- Independent Report Reviewers -- Preface -- Foreword -- Contents -- Introduction -- Proceedings -- Day 1--April 18, 2007 -- Day 2--April 19, 2007 -- Appendixes -- Appendix A: Index of Scientific Opportunities -- Appendix B: Workshop Agenda--Autism and the Environment: Challenges and Opportunities for Research -- Appendix C: Registered Workshop Participants -- Appendix D: Biographic Sketches of Workshop Planning Committee, Forum Members, Invited Speakers, and Staff.