Washington (CNN) While Americans were buying and opening their Christmas presents, the Trump administration's environmental regulators were wrapping up their work on some controversial issues, including some proposed rollbacks of Bush and Obama-era regulations.

Their gifts -- which you might have missed amidst the holidays -- include policies on energy efficient lightbulbs, water contamination and pesticides.

Here are the details:

Lightbulbs

The Energy Department blocked stricter efficiency requirements for many common types of lightbulbs that would have taken effect in the new year.