Mosquito control isn’t just about health and hassles. It’s also about potential harm to the environment. The latest TipSheet explains the ways municipal governments and private pest firms try to get rid of mosquitoes, and why those methods may be worthy of journalistic scrutiny. How to find local angles, plus, story ideas and reporting resources.

The nation’s parks are generally thought to be pristine natural havens. But a recent study finds the overwhelming majority suffer from air pollution problems like smog and ozone. That makes for important local and regional news stories, per the latest biweekly TipSheet. Get background, story ideas, resources and more.

It’s a category of more than 4,000 industrial chemicals that affect our lives nearly every day — and many of which are toxic. So what do journalists need to know to report on the emerging contaminants known as PFAS? Our most recent Issue Backgrounder offers a detailed primer on what PFAS are, where they come from, what their health effects are and how they might be cleaned up.

Millions of people across the United States are believed to be drinking PFAS-contaminated water. And a growing database could prove an invaluable resource for environmental journalists trying to get a handle on that public health risk. Our latest biweekly Reporter’s Toolbox, recently refocused on data journalism tools and techniques, explains how to tap the expanding PFAS data.