This index is an ongoing study, updated and refined quarterly. Many of the cities studied are now approaching their data collection limits, which brings us to the next phase of development: identifying and collecting data that measures bio-capacity and human anthropogenic footprints in greater depth. This is an iterative process that requires collaboration with all levels of government, academia and industry. The goal is to create tools that give people greater visibility into human impact on the biosphere and identify areas where solutions can have a substantial impact.
All formulas and equations used are published at the bottom of this article.
One indicator was revised and one indicator's accuracy was increased.
- Municipal Area Measurements accuracy was increased to 0.1 square km
- Housing Demographics Weighting was added for all building classifications