The human population has increased rapidly since the 1700's. For most of human history, there were fewer than half-billion people on Earth. In mid-2009, 6.7 billion people inhabited our planet. Because of these, extensive pollution is everywhere. As a student, what can you do to save not only a particular system, but the Earth itself? Tabulate your answer on a separate sheet of paper . Copy the template below. MY ENVIRONMENTAL “TO DO” LIST 1. 2. 3. 4. 5.​