U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Internet Explorer is no longer a supported browser.

This website may not display properly with Internet Explorer. For the best experience, please use a more recent browser such as the latest versions of Google Chrome, Microsoft Edge, and/or Mozilla Firefox. Thank you.

COVID-19 is an emerging, rapidly evolving situation.

Get the latest public health information from CDC. Get the latest research information from NIH.

Environmental Factor

Environmental Factor

Your Online Source for NIEHS News

January 2020

The 20 most-read stories of 2019 feature health, chemicals, pollution

Stories on PFAS, global pollution, and chemicals that disrupt hormone signaling dominated reader interest.

Once again, the Environmental Factor (EF) looks back at the top 20 stories of the year (see sidebar). In contrast to 2018, when cell phone studies powerfully dominated readers’ interest, three distinct stories stood out in 2019, collecting more page views than all other top stories combined.

The data below show the number of times a story was viewed during 2019. Many readers find our content through search engines, which means that articles continue to attract readers long after they are published. Therefore, stories from issues in the early months of the year have more time to collect readers that those in the most recent issues.

graph of Top 20 2019 Environmental Factor Stories by Pageviews: 1. Lavender oil linked to early breast growth in girls, 2. Pollution is a global but solvable threat to health, say scientists, 3. PFAS — a problem in North Carolina drinking water

Chemicals and health

Not surprisingly, chemicals and health concerns ranked high in our readers’ minds, and some topics showed up multiple times. Three topics had three appearances each on the list.

Kelly Lenox Lenox has edited the Environmental Factor newsletter for the past six years and welcomes input from readers. (Photo courtesy of Steve McCaw)
  • PFAS, or per- and polyfluoroalkyl substances, were the subject of articles published throughout the year. This class of long-lasting chemicals continues to make headlines across the country as more cities and towns detect PFAS contamination in their drinking water sources.
  • Endocrine-disrupting chemicals (EDC) appeared in stories about lavender oil, personal care products, and a meeting of EDC researchers here in North Carolina.
  • Cancer topics varied from the mechanisms of arsenic’s role in cancer to elevated breast cancer risk after childbirth.

Circadian, or daily, rhythms featured in two of our most popular stories, which reported on connections with obesity and variations in the body’s response to toxicants.

Featured stories

Like last year, half the stories on the list were from the top, or featured, section of the newsletter. The 10 stories from other sections suggest that those who come to EF read deep into an issue, not stopping with the headliners.

We select our featured stories based on wide appeal, importance, and timeliness with respect to the news of the moment. For example, the November lead story discussed a review of scientific literature on health effects of vaping, or e-cigarette use.

Although published late in the year, the piece ranked number 13 on the list, picking up on widespread interest in the mysterious illnesses among vapers across the country. That illness is now believed to be linked to the presence of vitamin E acetate in vaping liquids.

2019 top stories by (EFactor) section: Community Impact, 1; Feature, 10; Science Highlights, 6; Papers Published, 3

On what devices?

As with any digital publication, the most popular stories gain that status after readers share them on social media. A look at the devices our readers used underscores the power of social media in information sharing.

On average, about 10% of visitors to the EF site use mobile devices. In contrast, the top-ranked lavender oil story saw 30% of its readers coming on mobile devices, suggesting they are following links seen on Facebook, Twitter, LinkedIn, and elsewhere.

Stay tuned in 2020 for a new feature in the Environmental Factor — a rolling list of recent top stories.


Back To Top