Government says OSHA enforcement is "unambiguous ... in addressing grave dangers to employees in the workplace," in rollout of COVID emergency temporary rule.

In late December, the Federal Aviation Administration published proposed regulations governing the usage of drones in the U.S., triggering a pushback from drone professionals over rules requiring live transmitting of drone locations during operation.

It will take more than a year to finalize a rewrite of the controversial WOTUS, which then faces dozens of lawsuits.

Views of EPA administrator split along party lines, except on Superfund.