This week on the Regional Roundup, we revisit the award-winning series called “Loved to Death,” which explores the complex relationship between tourism and the environment. The series looks at the impact of social media influencers on local trails, a timed-entry system at Rocky Mountain National Park aimed at controlling crowds, and a historic railroad’s switch from coal to oil-powered engines after a wildfire. It also examines the threat of invasive species carried in by visitors.