Washington, D.C., launched a pilot program Thursday aimed at measuring air quality in specific neighborhoods. The D.C. Department of Energy and Environment hired Aclima, a San Francisco-based company, ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. WASHINGTON (AP) — Already struggling to keep ...

A Washington Post color analysis of D.C. found shades of gray permeate neighborhoods where the White population has increased and the Black population has decreased. By Marissa J. Lang and John D.