International negotiations on global-warming accords continue to be an expensive exercise in pointlessness, while the leading anti-greenhouse-gas legislation in the United States Senate, shepherded by John Kerry of Massachusetts, is said to be so lengthy it may make the recent health-care bill seem like a Post-It note. Release of Kerry’s proposal was delayed Tuesday when its sole Republican cosponsor, Lindsey Graham of South Carolina, developed cold feet. Some Senate action on the proposal is expected this spring.