This document summarizes efforts in Congress to pass legislation addressing global warming through amendments to other bills. Several Senators, including John McCain and Joe Lieberman, plan to introduce amendments. The Senate Energy Committee initially included climate change provisions but later removed them due to conservative opposition. Additionally, the Senate Foreign Relations Committee accepted an amendment calling for new emissions reduction policies and treaty negotiations. Similar amendments in the House last year passed narrowly and will likely be introduced again, but House Republican leadership opposes them.