As U.S. coal’s comedown continues, our latest Issue Backgrounder takes a close look at the factors behind the industry’s decline and finds a combination of economics, competition and shifting global markets, along with aging technology, politics and environmental pushback. What’s in store for coal in 2020?

It’s poisoning fresh waters across the United States, as well as elsewhere in the Americas, Europe, Asia and Africa. Blue-green algae is on the rise, lingering later and later into the year. Our new Issue Backgrounder explains the contributing factors behind the potent toxin’s scourge, its societal and public health ramifications, and the many angles and resources to tell the story.

Washington, D.C.’s long-neglected Anacostia River bears both tragedy and beauty. And author Krista Schlyer plumbs its depths in her most recent book, “River of Redemption.” In this Between the Lines, she speaks of her connection to the urban waterway, as well as her latest reporting on the environmental impact of the border wall.

An environmental documentary that follows a risk-laden effort to save a rare and elusive porpoise won over audiences at the recent Sundance Film Festival. Correspondent JoAnn Valenti takes a look at the film, along with other documentaries that explore the role of journalists and journalism. 

The vast Colorado River, recently in the news over a troubled drought deal, is at the heart of numerous environmental problems in the American West, where water is scarce and the legal complexities of water rights voluminous. The latest Issue Backgrounder offers an explainer on the story, which involves at least seven states, the federal government, Native American tribes, a hornet’s nest of irrigation districts and even Mexico.