Pre-Industrial Revolution, the concentration of CO2 remained around 280 parts per million by volume (ppm). In 2009, the concentration increased to about 386 pmm. Including other greenhouse gases, the total effect was 464 ppm CO2 equivalents.
The need for global solutions to environmental, social, and economic challenges is greater than ever. The Center for Sustainable Systems, within the School of Natural Resources and Environment at the University of Michigan, leads interdisciplinary research to support the design, assessment, and management of systems that meet societal needs in a more sustainable manner.

