Mark Buehrer, PE, is a professional civil engineer, author, inventor, and the founder and director of 2020 ENGINEERING. Since 1995, 2020 ENGINEERING has been at the forefront of the research and development of sustainable methods, systems, and infrastructures that reduce capital and operating costs, recycle and reduce material consumption and waste, and create and maintain healthy communities. Mark's innovative designs have been implemented on hundreds of LID, LEED, Net Zero, and Living Building projects, including greywater systems, rainwater harvesting, ecologically based wastewater treatment & water reuse systems, raingardens, algae microfarms, aquaculture, aquaponics, urban agriculture, and material recycling & composting facilities