All this week on the Brian Lehrer Show we're checking in on the de Blasio administration's progress on a variety of key issues, six months into his first term. We'll talk to advocacy groups about how the mayor has lived up to his campaign promises on the environment, crime, housing, and more. Friday, we'll hear from Deputy Mayor Anthony Shorris.

Marcia Bystryn, president of the New York League of Conservation Voters, discusses the mayor's commitment to environmental sustainability and resiliency in his first six months and points out challenges he has yet to address.