There's lots of buzz in the progressosphere about a new poll in Iowa -- site of a pivotal Dem primary -- showing John Edwards in the lead.

Another poll of Iowa Dems commissioned by Environmental Defense also found some interesting stuff:

• A 72% of majority of Democratic caucus-goers say they consider global warming to be extremely (32%) or very (39%) serious -- while another 15% say it is fairly serious. Only 11% dismiss it as just somewhat...