Dr. Wackernagel is the co-creator of the ecological footprint. He travels all over the world educating scientists, politicians and everyday people about the need for resource management on our planet. He has written many important articles and reports on creating and maintaining sustainable cities. In this section you will watch a video of Dr. Wackernagel talking about ecological footprints. You will first watch the video without answering questions, then you will watch it again and answer questions.