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.

A scientist contracted to report on climate impacts for the National Park Service was caught up in a fracas over attempted censorship of her findings. Now she’s been fired. That, plus a FOIA case before the Supreme Court and an enviro group sues the Army Corps of Engineers over info on a permit for a new plastics plant in Louisiana. Read the latest on freedom-of-information issues in this month’s WatchDog TipSheet.

U.S. courts will be a key venue of environmental conflict in 2019, as the Trump administration pushes back against an extensive array of long-standing environmental law. This special edition Issue Backgrounder looks at seven key legal disputes, including cases involving climate change liability, intergenerational equity and policy, as well as conflicts over maintaining national monuments, defining which waters are subject to anti-pollution rules, disposing of coal ash and extending offshore drilling.

The new year will likely mean subpoenas on EPA’s FOIA response policies, as a Democrat takes the chair in the House Oversight Committee amid charges the agency is choking off politically sensitive record requests. And are new laws in a dozen states making coverage of pipeline protests a felony? That, plus air emission exemptions for animal feedlot operators and data on illegal fishing. All in the latest issue of the WatchDog.