The Sierra Club launched a social media campaign calling on the Maryland Department of the Environment to cut pollution from coal plants, the club announced Thursday. The #StoptheSmog campaign includes two days of nonstop tweeting @MDEnvironment with photos of Maryland residents wearing red and orange face masks to highlight the number of bad air days residents have experienced throughout this summer. Organizers planned to post multiple photos each hour throughout the day. The Baltimore area has had four Orange Air Alert Action Days during the summer. On Orange days, those who are vulnerable to air pollution are cautioned to stay indoors. The action coincides with MDE’s process for drafting a new plan intended to reduce smog and sulfur dioxide pollution.