Athena's Impact Estimator software is now free

Athena Sustainable Materials Institute makes a few pieces of software that can be used to calculate a building's environmental impacts using life cycle assessment.  The newest version of their most robust software, Impact Estimator, is now free.  Other updates, such as incorporation of composite steel framing assemblies, is now included to better estimate quantities using conceptual or schematic design information. Although Impact Estimator can quantify impacts from building operation and architectural elements, it can help structural engineers quantify impacts from steel, concrete and wood structural materials.