The National Law Journal has launched Inadmissible, a regular Q&A series with Washington, D.C., legal professionals. The interviews will take a short, to-the-point look at an issue at the intersection of law and politics and highlight the type of work being led by professionals in the nation’s capital. If you are interested in being profiled, reach out to [email protected].

This week, Crowell & Moring partner Thomas A. Lorenzen and Siyi Shen, an associate in the environment & natural resources group in Washington, D.C., discuss the challenges legal professional face when trying to meet the Biden administration’s push for a zero-emission federal vehicle fleet. The interview has been edited for length.