Marco Rubio is the latest Republican to join the Senate’s bipartisan climate change caucus, the Washington Examiner has exclusively learned.

Rubio’s office confirmed he has become a member of the Senate Climate Solutions Caucus, adding conservative heft to the first such bipartisan forum for senators to talk about climate policy. The Florida senator follows the additions of other Republican senators such as Lisa Murkowski of Alaska, Mitt Romney of Utah, and Lindsey Graham of South Carolina.