The U.S. Centre for Disease Control and Prevention agency has removed the phrase “climate change” from its website on climate change’s contributions to occupational hazards.

Shortly after President Donald Trump‘s election the CDC changed the name for the National Institute for Occupational Safety and Health’s (NIOSH) page “Climate Change and Occupational Safety and Health” to “Occupational Safety and Health and Climate,” according to The Washington Post. In addition, multiple other removals of the words “climate change” occurred shortly before Trump took office.

The real reason of the changes is unclear. NIOSH spokeswoman Christina Spring told The Post that the term “climate change” could be confusing since that is not what NIOSH focuses on. “We routinely go through our website and update content on a variety of topic pages,” he said.

NIOSH is an agency conducting research to improve the safety of workers.

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Outdoor agricultural workers are directly affected with kidney conditions tied to working in high heat. “It’s clear the world is getting hotter, it’s clear the recovery temperature at night is getting warmer . . . and it’s having very clear outcomes like kidney failure and outright heat stroke,” Jason Glaser told The Post. “And if you can’t have a conversation about these things based on the data, using the terminology that we’re familiar with, then eventually you can’t even ask for the funding to continue it. And that’s going to have a real cost.”

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The changes parallel other moves at the CDC to proceed cautiously on the subject of climate change in the Trump era. Shortly before Trump’s inauguration, the CDC also canceled a conference on climate change and public health that had been planned for early 2017.