They don't want their wrong doings exposed, so they slap 'secret' on everything they don't want the American people to know.  So anything Climate Change is verboten.

"Interior official turns whistle-blower, claiming retaliation for climate change work" PBS NewsHour 8/2/2017

Excerpt

SUMMARY:  A government scientist who studied dangerous climate change in the Arctic got an ironic reassignment at the Interior Department from the Trump Administration, collecting checks from oil and gas companies.  Joel Clement, the former director of the Interior Department Office of Policy Analysis, believes he was reassigned because he worked on climate change.  Clement joins William Brangham to explain.