What is the fine-grained topic of the following text: ASPEN — Railroad Commissioner Christi Craddick contributed to a series of panel discussions on issues surrounding energy and the environment at the Aspen Institute’s Modern Shale Gas and Oil Production Forum in Aspen, Colo. this week. Only return the topic.
Christi Craddick's participation in the Aspen Institute's Modern Shale Gas and Oil Production Forum discussing energy and environment issues.