I'm not sure we need two different tags. Most everyone uses the verbiage
climate change and not
global warming nowadays (at least in politics). I'm not sure there's a good case for having separate tags for political discussion purposes.
Global warming refers only to the Earth’s rising surface temperature, while climate change includes warming and the “side effects” of warming—like melting glaciers, heavier rainstorms, or more frequent drought. Said another way, global warming is one symptom of the much larger problem of human-caused climate change.