A group of Democratic senators is holding an all-nighter to call attention to global climate change.

It's not a filibuster since there's no legislation under consideration. Senator Barbara Boxer of California said the talkathon seeks to "wake up Congress" to the reality of climate change.

Rhode Island's Sheldon Whitehouse said the "cost of Congress' inaction on climate change is too high for our communities, our kids and grandkids and our economy."

More than two dozen senators plan to participate in the marathon discussion.